It sounds like you are probably having gastroesophageal reflux disease (GERD)- The Tums may give temporary relief, although you are likely to get better results with Prilosec (available over-the-counter now)
You should avoid all caffeine, alcohol, tobacco and aspirin or anti-inflammatory medications (ibuprofen, naproxen, Advil, Motrin, Aleve)
If you continue to have these symptoms, I would suggest that you see a physician.
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