Ugh! I can relate to all the girls here too. I pulled my hammy (left=most flexible side) almost a month ago. I didn't hear the "popping" sound some of you have described though, that would scare the shit out of me! It's the second time this year I've pulled it, and both were my own fault. :( I didn't feel it at the time (either time), but only the next day...and the next week...and the next month(s). It really does feel like it takes forever for these things to heal.
My problem is that I'm easily overly excited (like a puppy). :P I work so hard to try to get my splits, and when I finally get them I want to show them off. Well you can't just say to your friend, "oh i got my splits, want to see? Okay, give me an hour to stretch first." You kinda lose the moment. The first time I pulled it, I was doing just that, showing off at the end of a pole class. I figured I was good and warm, but apparently I hadn't done enough stretching of that particular muscle... The second time was really dumb though. I had just gotten my splits back on that side since losing them after pulling it the first time. I was practicing at home, and I didn't really do a warm-up (duh...I know), but I was freestyling for a warmup. You know, no tricks just light spins, transitions and floorwork. Generally works, but I got really into a song and was doing a series of floorwork and I just kind of did them without thinking about it...and I'm still suffering a month later. The good news is that I can finally feel it getting a little better. I can touch my toes on that side again, but straddles are still a killer.
I've promised myself I wont do it again. Twice in one year is plenty, thankyou very much! Pictures are a much better way to show off, and when I do finally get them back, they won't be going into any dances until I KNOW I can do them easily.