4am with severe heartburn!

Ladies I need help! I get heartburn so so so bad lately (I'm 35 weeks) and it's to the point I don't ever sleep bc of it. I take pepcid. I don't eat spicy foods. I wait a few hours before I will lay down for bed. And when I do go to bed I sleep elevated All of this and it's still horrible! I'm literally almost in tears bc it's so bad and I'm so tired! Water and milk aren't helping either and idk what to do!???