LOL! Oh Judy! I am the QUEEN of waiting it out!!! When you have as much medical knowledge as I do, you can pretty much tell when something is going to be OK - or not!
If I hadn't lived with gimpy knees for 44 years, I probably would go to the doctor now, but I know what they would say and there really isn't anything to be done at this time, for either of the knees.
I think I'll probably have to have the knee with the missing ACL replaced at some time - but then again, most people with an injury this old (44 years ago) have arthritis after this long, but I do not, so maybe I will escape the replacement, but probably not. The good knee that hurt yesterday, well it takes a lot of punishment since I defer to it for all things. Thus, it may actually wear out before the bad knee, if that makes any sense.
It's OK, don't worry about me, I just needed to whine and cry a bit

. You can be sure though, if it keeps acting up and I have pain longer than a couple of days, I will go to the doctor.