The pediatrician says we are on the right track with his feedings, including being on the Gentlease. His fussiness and such should all settle down in the next couple of weeks, and if it doesn't then it might be reflux, but more than likely he will grow out of it. BTW, he is now pooping once or twice a day pretty regularly, which is normal for his age. We had several blowouts to get to this point though, which were quite messy! One required cutting his onesie off of him because there was poop all over his back and no way to get that off without spreading it more.
The nurse that gave him his shots was super quick at it; apparently she's been doing them for 30 plus years. They asked us a lot of developmental questions and he's dong well there too. Overall he got a clean bill of health and we have another appt scheduled for 6/29 (4-month appt). I'm sure we'll be there sometime between now and then since he starts daycare on 6/1.
After that, we went for his first shopping trip - to BJ's. We were out of all the household essentials - paper towels, toilet paper, etc, plus we needed meat and formula.
He's been sleepy all day today, we figure this is an after-effect of the shots. Hopefully tomorrow he'll be back to his happy little (ok, not so little) self. :)