Hi there! I've been in Uganda for a month now, taking doxycycline for malaria prevention. About two days ago I got a feeling like something was caught in my esophagus, sort of behind my breast bone, and it won't go away. It feels like something is lodged, but I'm quite sure it's not - I've had lots to drink and eaten since, and also tried coughing. A friend told me the doxy might have burned a hole in my esophagus. Help please!