Hi, my wife was recently treated for mesa staff infection and around the same time I developed a lump that I cut open myself and drained white pus out of it did get better however I developed another lump in same area few days later. I called a friend who is a M.D. and he called me in Clindamycin HCL 300 mg I take one every 6 hours and have been on them for 5 solid days now. However since I started taking them I have developed a lot of mucus and had severe sinus issues also have had a constant cough and headache I also haven't been able to sleep AT ALLLL maybe had 4-5 hours collectively in past 5 days. Could this sickness be from the staff infection? All the symptoms I have read online say it would be the opposite and I would be severely fatigue. Should I go to the ER?