elbow hurts

[hummingbird]

I'm hoping someone here will have some good advice for this. Last week I had the chance to knit way more than normal. The next day my right elbow hurt. It still hurts off and on now when I bend it, usually while knitting or on the computer. I've been trying to give it rest, but it is still bothering me.
Has this happend to anyone else here?
What should I do for my elbow?