Really need help

Went to bed last night around 11pm

Woke up at 3am having hella bad heart burn it was making me feel like I'm going to throw up.

And my body was completely drenched in sweat. I was waking up every 30 minutes not getting comfortable.

Then today i still have heart burn really bad. I've taken 4 tums and it still hasn't went away.

What do I do?? I'm 36 weeks and 3 days.

I know time is close but this is just to painful

Absolutely worst part of my pregnancy is this horrible heart burn