Don't despair, I had that too. It will subside by 12 weeks. But ask ur doctor / midwife to recommend something. Here in the UK we have an antacid called gaviscon and that was my best friend. And now I'm in the third trimester it's all come back again with a vengeance , so am taking it again.
I was the same exact way and im 19 weeks now and it has gotten better but still bad. It hurts bad. That's my biggest symptom accompanied by the constipation.