GERD!?!?!?!?

Anyone have any suggestions. I’m pregnant with my second. 21 weeks. And I had it when I was pregnant with my son too. It’s so miserable. I already drink water and do tums. I take heartburn medication twice a day. It’s miserable. I’m suffering right now. I have to sleep at a 90 degree angle. There is this burning in the back of my throat and stomach acid comes up and I start choking on it and it burns my esophagus and I also choke on it while I sleep and feel like I’m suffocating. Then the burn and horrible taste won’t go away for days and it makes me feel like I have bronchitis. If I cough it gets worse and makes me get physically sick from it. Any suggestions would be appreciated.