Tendonitis is tough to get rid of. Rest the effected area!
Aspirin works well for me as an anti-inflamatory. It works differently than the other non-steroidal anti-inflamatories. If it doesn't upset your stomach, you may find it works well for you. Others find it no more than effective than a placebo.
I had achillies tendonitis in college where I played on an NCAA D-1 soccer team. It took prescription drugs to finally overcome it. Just the slightest effort inflammed it until the drugs were prescribed. The specialist told me that at some point the inflamation was actually causing the problem rather than being the result of another problem. He must have been right, because the inflammation passed in about the 7th day of the drug therapy and I have not had problems since. (30 years) (My problem was initially caused by constant taping of the ankle, a common situation. Unfortunately, once existing, NOT taping the ankle didn't cure it!)
Good luck and a speedy recovery.
Tyson