I have a 4 year old Chesapeake Bay Retriverwho's ...

I have a 4 year old Chesapeake Bay Retriverwho's back leg seems to be hurting him.

We were playing catch the stick about 5 weeks ago when he stumbled and feel over a stick. I thought he would be ok in a day or two. but it's been a few weeks now and he still won't put pressure on it while standing in place.

Don't have a lot of money to take him to the vet.

 Any words of wisdome?