I took generic mylanta--walgreens comfort gel. Shake well--tastes awful but it works. OB said it's ok. I'm also 19 wks this week. I had to lay off the pasta with red sauce & pizza. I also get everything mild now but I like spice when I'm not pregnant. Good luck.
Since you're in your 2nd trimester you can take Pepcid. But if you don't want to take any medicine while pregnant avoid spicy foods and don't eat and lay down. Try eating about 3 hours before going to bed. I also read laying on your left side helps.