Anyone had anything similar occur to them? Similar symptoms? Anything? I'm at a loss.?

Alright. Some background information. About a month and a half ago I went to my doctor for terrible lower back pain (mind you I'm only 19) and some abdominal discomfort, headache and fatigue. She diagnosed me with a sinus infection and adenovirus. She said it may take awhile but I should improve. Finally my headache and abdominal pain stopped, but my achilles tendons started aching along with the sides and soles of my feet.I attributed this to my flat feet and went on. The next day I started feeling very nauseated. (No before you ask no chance of pregnancy.) Now I've been dealing with constant nausea and fatigue for almost 2 months. Along with the aches. But last night was slightly different and shook me up a bit. Around 3:30 in the morning I awoke feeling as though I was about to be sick, I rushed to the bathroom. I stood in there awhile and my face sudenly became hot, I started to profusly drip sweat and became very dizzy.I almost vomited. Any ideas? Everyone still thinks its Adeno!