I Am A 39 Year Old Female About 2 Weeks

I am a 39 year old female about 2 weeks ago I had some knee pain and went to the ER, they told me I had a torn meniscus...now my knee is better, but I am having horrible hip, ankle and occasional knee pain-mostly joints and some elbow pain. I know it is probably arthritis, but why would it all occur at the same time...I have taken an anti-inflammatory, ice, rest, and some slow strengthening exercises. Nothing is working! Please help.