All of a sudden I got a cough, the same day a few hours later I started feeling pressure/throbbing in my head, it quickly traveled through my body followed by intense lower back pain then I was literally struck immobile laying on the floor contorting my body sweating and moaning in terrible pain. I woke up this morning with just a cough, runny nose, slight headache and body/joint aches that come and go. What is wrong with me?