heartburn, reflux, indigestion

Sarah • I’m 32. Divorced. 4 kiddos. (8,6,2,2)
I have terrible heartburn, reflux, and indigestion. To the point I throw up multiple times a day. I now have ketones in my urine from being in "starvation mode" at 29 weeks pregnant. I was originally told to do Pepcid once a day. Now I'm doing it twice a day. It doesn't seem to be working anymore. Any suggestions? Water gives me heartburn for pizza sake ;)