Ouch is right....
I banged up my PCL and torched my ACL years ago. Thought I could tough it out by keeping my quads fit (I have an uncle that did that), but I was a bit too active.
Over the next two years, I managed to do more damage every time it went out (read femur went left or right, tibia stay in same position). Hosed up all the rest of the tendons on the side, and powdered my meniscus. Every time it went out, I had to walk around with crutches or bent-legged for about 5 weeks. After two years, I got smart and had it fixed. Took about 10 months to recover (less now that the repair procedures have improved).
Wish I'd have fixed it right away. On the downside, a summer in AZ with your leg in a full foam brace fills up your shoe with sweat real fast.
Jason