6 week's ago I had a knee replacement, I'm experiencing constant nausea, dry heaves, sweats, chills, loss of appetite, and fatigue.I can't get out of bed some of those days. Been out of work the whole time. Out of those 6 week's I have had 7 great day's. Not taking any pain pills only Zofran and meclizine because they diagnose me also with vertigo after the surgery. It always seems to happen every day after my physical therapy.. I'm at the end of my rope any suggestions would be great