Is Everything Okay?

I am getting ready for Soren's 15 month check up this week (WOW - I can't believe it has been 15 months already). I have a small list of questions/concerns for the doctor, but most of my "is everything okay" questions relate to his diet. I know the books and the websites make it seem like everything is okay,after all he is a toddler, but I am still concerned. I suppose my feelings stem from when he was a newborn and he lost more weight than expected in the hospital and we had issues with breastfeeding and were constantly monitoring his weight, or it could be the fact that I watch too much television or read too much on the Internet about child issues - I think I need to chill out. Nonetheless, I will be dragging all my "what about this" and hypothetical scenarios to the pediatrician this week.