How to Relieve severe heartburn/indigestion 38 weeks pregnancy?

I am 38 weeks. I am in pre-labor meaning baby is engaged, cervix is softening, and I have been getting a lot of contractions. However, over the past several days my heartburn and indigestion has completely worsened. My tongue has an acid-bitter taste, my mouth has this taste too no mater what I do it doesn't go away after I eat, I have chest/throat pain, burning, belching, etc... I eat lightly and small. My husband made quesidillas tonight and I had one with beans and salsa and it has given me the worse heartburn I've ever had. I usually take rantidine 75 mg, but since being pregnant I've not taken anything. I have a history of digestion problems including gallbladder surgery when I was 10 weeks along! I just can't take this burning anymore. I haven't had so much digestion issues since my gallbladder was removed in March.

Please what can I do? I've tried water, resting, moving around, taking my mind off of it (very hard to even do), but it still persists. It has been 6-7 hours since I last ate! Worse is the heartburn bothers my asthma and stirs it up. I am burping acid as well. Just very uncomfortable tonight with this issue.

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