Stuff really works symptoms and conditions

I've been taking Doxy for a week now (100mg 2x daily) for epididomytis. The second day of taking the med I woke up with terrible heartburn. I thought that the med burned a hole in my lower esophagus from from taking the med late the night before. I have had nausia once for a few hours, though the worst side-effect is the terrible chest pain as I swallow or take deep breaths. It feels like I am swallowing a golf ball and it is stuck about 3/4 of the way down. Occasionally it feels like it is trying to come back up. I too have had some excess gas. I hope this stuff really works without causing long term side effects.