Glad to hear an update! Formula definitely makes them more solid! One thing you can try for the constipation is to put prune juice in his bottle. I believe it is one tablespoon per two ounces but I can't remember for sure LOL. And put some diaper rash ointment on him even if he's not red...anything to help it out LOL. Being a first time Mom is an overwhelming time....excitement, fear, joy, fatigue LOL. But always trust yourself. If anything ever feels "wrong" even if you can't put a finger on it always check with your Doctor. I have often diagnosed what is wrong with my kids before even taking them to the Doctor....ok it helps that I have a nursing background....but when I have been dismissed by a Doctor I persist if my gut tells me to. You hang in there and know that you are the best Mommy for your little boy. Everything will work out and be fine!