Answers: As long as it popped back into place and you didn't slash any tendons or ligaments, it should heal up surrounded by a week or two.
Wrap it snug but not so tight it cuts circulation with an ace wrap or find a special knee "brace" at the drug store. The neoprene ones work okay.
I have a disease that cause my joints to pop incompatible all the time and I use the neoprene wrap to oblige it heal faster.
they probably won't. if i be you, i'd go to the doctor or try to pop it hindmost into place.