I think my stomach is on fire :(

My stomach feels like it is on fire 24/7. The only time I get relief is when I'm sleeping. I've tried tums with no avail and it doesn't seem to matter what I eat. I haven't vomited yet but have occasional episodes of gagging. I'm 7.5 wks pregnant and don't know how much longer I can deal with this irritation. I'd rather have a physical injury before I have gut pain ever again :(