In the last few months, occasionally I was having hot and cold flashes and fatigue around my period. Now for the last 3 days, I have had a severe headache above my eyes and sometimes in back of head, hot and cold flashes, feverish, dizziness, fatigue, nausea, and back pain. I have also been fighting when a knee that has been giving severe pain off and on for the last 3 weeks. Please help.