Second trimester, but I keep puking stomach acid! Help!

I was so happy to finally make it to my second trimester, but I keep puking stomach acid in the mornings. For a while, eating baked potatoes right before bed was working, but then it started again. Now, I'm trying to get up in he middle of the night to eat something for my stomach to absorb, but I just puked that up too because of the stomach acid. I feel like I can't win for losing, and I'm just praying this doesn't effect the health of my teeth long term. Help! Any suggestions?