Very painful cramping on left side...

Kristin • Been married 8 yrs, actively TTC for 6 yrs. I have PCOS & insulin resistance and never ovulate. My cycles are 100+ days. We just finished our fourth round of clomid.
Very very painful cramping on left side pelvic area. This is the 2nd time this has happened, 1st time was in october. It makes me double over and nothing seems to relieve it. It's a contracting pain. Anybody else experience this?