Thank you. I have thought about trying the Tommy Tippees. Next time I'm at Target, I will grab some and see if that works.
As far as increasing my milk supply, I have eaten oatmeal, drank more water, and taken Fenugreek. At first I was pumping after each nursing session but it was so much work when he literally ate every hour and a half that I quit pumping so much. I started pumping after each nursing session again today, so hopefully it will help. My supply has increased some. At first, I could only pump about an ounce even if I didn't nurse him, but now if I don't nurse him, I can get about three ounces. If he has already nursed, I can usually get an ounce or more.. I know that pumping isn't really a good indication of how much I am really producing because you don't get a good letdown like the baby does.
He usually nurses and stays content for an hour when we give him three ounces of formula. Sometimes he drinks it all, sometimes he doesn't. I know that that is A LOT to be eating for how young he is, but his pediatrician wasn't concerned. However, I have decided to try to just nurse him again if he still acts hungry after an ounce or two of formula, because of how fussy he gets sometimes when he takes the bottle. I think that he might just be overeating and getting really sick from it. Although he NEVER spits up. And I mean never. He has spit up three times since he was born (and that was in the first two weeks that we had him).
I have also noticed that he has a sensitivity to the formula in the last few days. He has been having green runny poop in the evening after eating formula during the day but in the morning if he poops, it's normal. (He usually only eats breastmilk at night). I am going to change his formula for now but I'm hoping that we can throw out the formula for the most part soon.