I do not know who you people are, but I feel like I have stumbled...

I do not know who you people are, but I feel like I have stumbled onto some help. Please tell me this is not a joke....I am on Doxycline for three days now to treat a sub-clinical suspected infection. I started to feel noticeably flat yesterday, (day two) almost like I was missing a range of emotion. I feel as if someone drugged me wtih some kind of downer. I woke up feeling ok this AM, but have felt worse and worse as the day has gone on. I am in good shape, I am generally an upbeat person, but I feel so profoundly sad, listless, confused, and tired. It as if I am living in a fog, and that every thing requires serious effort. The good news is that I am only on this medication for ten days, I cannot imagine having to take it for longer. Had a little heartburn last evening, but nothing serious. Good luck to all, Marc Astoria, NY