I did that in the military. Put it back and had to walk a few miles to the nearest base and then I could get transport. When I got to a Dr I told her how it had come out. She asked if it went back by itself so I told her how I held the leg straight and picked up the knee cap and pulled it around to the front. That Dr asked "Didn't that hurt?" I told her "no, I want to do it again." She could not believe I put it back and then walked on it. I just asked what was I supposed to do just lay there and die. I don't think Dr's are all that bright.
So now I will tell you to just suck it up and stop that sniveling. Pain meds are for wimps. Just rub some dirt on it and get up.
Now when my knee pops out I have learned how to fall so it does not come all the way out and then get back up hoping nobody saw me fall.
I have hunted with people running full speed to a bay. I just can't do that. They have better technology now but I was offered a surgery that would either work or I would not walk again when I did mine the first time. I am thinking about getting surgery on my knees because things are much better and I am tired of falling.