Pain in few parts of body. Viral rash.

Since last Saturday(5 Aug), there was a little ball under my right armpit which pained when I pressed it. After that, I went for a trip with my friends where the climate was chilling and air was wet. Monday evening, I felt fever and took 2 sinarest tablets in total till the next day. Also, the stiffness and pain under the armpit was gone. But I found some pain under it in the rib cage bones to the sides of my body. I can't feel any pain unless I press the bones. My left chest area, I have some stiffness and pain. Pain when pressed in few other parts of rib cage bones. Now, I feel similar pain just little above my left leg ankle when I press. Also today, similar feeling in right hand finger bones and left hand thumb. No breathing problems, no cough. Starting yesterday, I'm taking Azithromycin 500 tabs for cold.(Running nose and sneeze yesterday). Had some red rashes yesterday, but Dermatologist told my roommate(who also had red rashes but nothing else as me) that it's some viral rash.