Taking Doxycycline for sinus/bronchitis infection. Still have a bad deep dry cough.. wondering if its not from the medication... also have what looks like bug bites on my lower cheeks.. but thinking it might be a rash. Definitley have the headache and disconnected feeling.. can't concentrate or handle reading/light. Heading for Jamaica in 4 days.. I'm gonna stop taking it now.. (only have a few days left).