You know yourself better than anyone does, but even you're in a situation, where you're flying blind so to speak, and you will have these moments.
You will doubt, you will question, and I've said it before, that questioning things is good, providing you don't start coming out with loads of negative answers.
You could potentially do both shows, but the almost certain fact is, you will be ready, and don't forget, there is a possibility you could do some kind of Water loading system, 36 hours before, which might tighten you up some more.
The main thing is not to let any low Carbs, and any pre-show nerves get the better of you, and don't think about the enormity of the moment, or who might be there, just think about being that amazing young Lady, who's done good.
Think about what sort of life issues you had a teenager, and think about how much stronger, mentally, emotionally and physically you are, and how much you've achieved since then, with your work and education.
Then you can begin to see this as less of a challenge to overcome, but a moment to savour, a special moment, to give yourself extra validation. A chance to prove to yourself just how special you are, when the whole audience looks at you, and wonders who that shining little star is, living and loving every second of a special day.
The day a teenage girl with life issues, really became a young Lady, with a fabulous body, and a great life.
This is a top of the mountain moment for you. The chance to prove that you deserve to be recognised as an athlete and deserve to be respected for who you are, and that you can show people you can commit to something this demanding and see it through. Something that tests your emotional, mental and physical facets, in a way teaching spinning classes, and learning high brow knowledge, don't quite do. Though that isn't meant to take anything positive away from those things.
You are doing a brilliant job. You've stuck to the task in hand, you've really tried to find time to practice poses, been rigorous on the diet, never caved in once, never missed a single weights session, cardio workout, and never complained about how hard you're finding things.
You are proving yourself to be someone who could be a future champion.
You are giving your all, pushing on, staying positive, surrounding yourself with positive people people, and not letting other influences in life, distract you, or do anything to hamper your efforts.
You have so much to be proud of already, and so much to look forward to, not just for the first show, but future shows.
I know you can be so much, and do yourself justice. I know you're going to look amazing on the day, and you're going to make a lot of people, myself included proud of you.
The little Lady with a big, big heart, and a lot of courage, and an inspiration and rolemodel to other people especially young females, who have or have had an , because your actions are showing such people, you don't have to feel worthless and there is a better way, and not a long pointless road of pretty wasted living.
So don't fear the unknown here, just anticipate one of the best days of your life, and live every coming day, like that moment is going to be as special as you deserve it to be.
You CAN and WILL be good enough, to do this. You ARE good enough, and you DO deserve this chance. You WON'T put yourself to shame, or fail yourself as a person, and you WON'T let anyone down, least of all anyone here, if it doesn't quite go how it could, but you CAN be a champion, and CAN be a great athlete.
You know about 4 years ago, I saw a picture of a female winning a seniors BB comp at 51, and she looked 10 years younger easily, so you have so much time to get experience, improve, get your prep style down and be what you're capable of being, this isn't one of those last chance things, if it's not quite worked out, it's a lost opportunity forever.
So do keep questioning things as it's human. If we didn't we'd still be living in caves, eating dead rats and picking our noses a lot

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As for the mood swings, that is normal for a lot of people, as it gets a bit more stressful and the reduced Carbs take a little toll, so that's to be expected. You might just have to try and fight it if it happens, but make some people aware it could, and it's not meant as a genuine reaction, because anyone who knows you knows, you're too loving and caring to be a tetchy so 'n' so or a crank.
The main thing here is not to be overly concerned, and you're doing the right thing, not becoming a stress head all the time about being ready and looking good enough, because you'll be fine. It's your first time, and that's understandable, but I'm confident you'll do really well, and it will work out.
You should be proud of yourself, for the person you have become in the last 6-8 years, and this moment in the spotlight, will be your way to culminate a great life transformation, and hopefully start a great future as a stage athlete, and potential champion.
Stay strong, chin up, and no worries yeah. You're doing brilliantly, and I'm one of those people who's proud of you, and I'll always be around for those days, when it all seems a little too much.
Keep going and GOOD LUCK

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