I took a 8 day regiment of 750 mg for pneumonia. I started develo...

I took a 8 day regiment of 750 mg for pneumonia. I started developing joint pain in my right thumb on day 5 and then my left shoulder on day 6 by day 9 I was unable to raise my left arm over my head. It is now in both hands. I am so stiff in morning I cant turn a door knob with out lots of pain and forget trying to open the dishwasher where you have to squeeze the lever to open the door. In the shower I use my right hand to raise my left arm ober head so the warm water can run on my shoulder blade. warm water also helps relieve the pain. I am hoping this is just a temporary setback cause I never had symptoms like this before. 57 yo male