Hi, I just had an ACL reconstruction and have been recovering for a few days. Today however, while my knee was resting someone, trying to help apply a bandage to my knee, bent it pretty quickly and I felt a little pop around the lower kneecap area. I know this could have probably have just been a muscle cramp since it felt like one but I wanted to be sure nothing bad happened. Do knee cramps happen often and would I be able to feel pain or know if something did go wrong, thank you