27 weeks pregnant with awfull acid reflux/heart burn?

All I've eaten today is Cheerios and a granola bar, and I STILL feel like my chest and throat are burning! I'm so miserable, what can I do? Thanks...
Update: Tums don't work... and I can't drink milk. I drank to much as a child and threw it all up so now I have a taste aversion...
Update 2: I'm 27 weeks pregnant... I'm WAY out of my first tri... lol
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