HEARTBURN 😈🌋🔥🔥

Hey everyone! So I'm 35 weeks pregnant and on strict bed rest. I have been having such horrific heartburn, that it's hard to lay down for more than a few mins before I feel almost like I'm going to puke up stomach acid (Sorry to be graphic). I've tried tums all day and all night, milk, no spicy or greasy foods, but I still have this horrible heartburn! It's so bad, I can't even fall asleep at night! Does anyone have any suggestions/ remedies? Thanks in advance!