Talk to Gynecologist on Consulting A Gynaecologist

Salam. I'm 39 weeks pregnant and been suffering from extreme heartburn for the past 1/1.5 weeks. I feel like all the stomach acids come up till my throat at night. Drinking milk is not helping anymore so I'm taking 2 tsp of Mucaine syrup almost daily at night. pls tell me is it safe to take this syrup during pregnancy and at 39 weeks? if not, kindly tell some OTC medicine and remedies for Heartburn pls as it's very extreme