Stomach Problems, Alphabetized What Could Be Causing My Stomach Problems?

What could be causing my stomach problems? - stomach problems, alphabetized

I had problems with my stomach for about 2 months. I'm often bad throughout the day. I had a couple of times heartburn and tossed into the mouth a few times (I know, gross!). Burp a lot. I've tried to notice if certain foods reduce Worse, smoking, etc. I know, sometimes when eating the stomach for several minutes. I have an appointment with the doctor in 2 weeks if no improvement. I think it could be an ulcer or gastric reflux. Ideas?