My hands hurt, swollen and have knots in the knuckles, plus knees hurt and are stiff, feet swelled a little bit. Start bout 3 weeks ago?

I suggest. You be evaluated by your dr. You may need lab work and diagnostic testing .
See your doctor soon. You could have any number of conditions going on. You nee to see your physician as soon as possible! given the multiple joint complaints this could be related to an arthritis condition, in which case you will probably need to see a rheumatologist.