When to be concerned with heart burn?

I’ve been having bad heartburn at night but it’s been constant and tonight is the second night and feels like it’s worse. I’ve taken tums and I just took an acid reducer hoping it’ll help. Any other remedies I can try? It’s very painful comes and goes and it feels like its going up my throat and when it does that I can barely breathe and I feel nauseous😭. I know it’s normal during pregnancy. But is there any time i should be concerned!? I take chest pains seriously but I know this is probably just pregnancy related