Heartburn😖

33 wks. I'm in misery. I have the worst heartburn at night. I take Zantac 150 and it still doesn't work. I eat dinner by 6 and still my food hasn't digested, by 11 I'm waking up choking on food leaking into my windpipe. I am resorting to sleeping sitting up on the couch and so close to making myself throw up.  This is the WORST! So exhausted but can't lay down or I'll choke to death!