Constantly worrying...

I hope that my worrying is normal - otherwise I'm in trouble.  I am constantly worrying about Jack.  It seems that when we get through something bit, something else pops up.  Like right now, we have been improving on solids and eating a consistent 20oz of formula/day for the past month or so, which means that when we were at the pediatrician on Friday for his synagis shot, we had a fantastic weight check - up to almost 18lbs!  I was very happy and so was the pediatrician's office.  This weekend, Jack started drinking less from his bottles - only a couple ounces/day but continued to eat his solids very well - 3 good meals/day.  Now today, he took only about 17oz of formula and didn't eat hardly any dinner.  I know we have overcome so much and he's starting to do well with weight and eating more variety of foods, I thought we were on a good track.  Hopefully this is just a small setback to where he is just starting to wean himself down on his formula amounts but the not eating dinner concerns me a little bit.  I'm planning on calling the pediatrician tomorrow to make sure he isn't getting sick (from me again - I can't seem to stay away from colds this fall) and that is why he isn't eating.  So much fun!