I have random mild knee pain that has lasted a couple of weeks. should i see doctor?

What alternative?: You can just wait - but if you use it incorrectly, it can take a long time and may not heal as well as it would w/ knowledge behind the strategy. Find out what's wrong, how to deal w/ it and you'll do best. Ask any old person - they'll say knees are important!

Yes.: See a non-surgical sports medicine specialist, who will start with a set of xrays. It could be a very common condition that may just need some physical therapy, but you don't want to miss something more, if it is there.