Not loosing weight

[wannabefine]

I am having a hard time loosing any weight was hoping for a little advise.

Here is average diet:

5 am: Plain oatmeal with either hardboiled egg or some peanutbutter
8 am: protein source (hardboiled egg, nuts) and fruit
11 am: lunch- salad with chicken or a sandwhich on whole wheat bread
3 pm: snack and/or protein shake (I just added the protein shake about 2 weeks ago)
6 pm: dinner- normally chicken and vegtables

workouts normally consist of 4-5 days cardio for a range of 30 minutes to 1 hour using either the treadmill and or recumbant bike. I will also alternate in the p90x pylometric video, kenpo x or something to fill the cardio days.

weights:

I am right now doing the P90X which breaks it down into a split of
chest/back, abs
shoulders and arms, abs
legs and back, abs

Any advise would help. I have been following this for about 2 months now and wieght just seems to fluctuate 3 or 4 pounds every month. Just when I think I start to loose, i seem to gain it back.

A little history, I have always been an active person and always worked out for about 6 years but nothing serious or a strict regimen. have also had two kids in that time. diet stays fairly clean all of the time.

Thanks again in advance for any advise.

How much Water are you drinking?