Man last winter I got really sick too lasted like 3-4 months. My lymph nodes in my neck were swollen for like 4 months. My doc said I had an upper respiratory infection and put me on antibiotics. It seemed to help a little so I started doing stuff mostly just a lot of running around cause it was close to the holidays. Well Christmas eve I was feeling OK so I figured I would go to a party and have a couple drinks and I smoked a little weed. Man that first hit of weed made me feel so freaking sick I could not believe it!! I felt like puking. Well I had a few more drinks and went home not feeling too good. The next x-mas morning I woke up puking my guts out and felt terrible all day and on top of that I had a long drive to make that day!! Worst x-mas I can remember.
So after that I rested at home for like 2 weeks still not feeling good, I figured I would try a very light work out. I could barely breath through the work out which was about 30% of what I usually do and was sweating my ass off. Went to the lockerroom to blow my nose and spit up some flem, well when I spit up the flem it was mostly blood!!! I walked straight out of the gym and drove to the ER, they x-rayed my lungs and checked me out. I was so scared when I saw that ER doc walking toward me to tell me the results of my x-ray it was like slow motion in a movie, very surreal. he told me I was fine my lungs were clear, I started to cry I was so relieved I could have kissed that guy. He said I had a virus that was lingering and taking its sweet time leaving. I went home and threw away all my weed and paraphernalia, cause the blood had me thinking lung cancer.
It took about 2-3 more months till I really felt right again, still not 100% sure what hit me. I would say rest now and get better or you make it worse.
