Did I ovulate for sure? HELP PLEASE

Rawiya

So I took letrozole this month, on Thursday I got a positive OPK after 4 days of negatives. My nipples are sore, I was cramping yesterday on the left side and I saw fertile cervical mucus. Does this mean I ovulated for sure?? That an egg was released? Or could it be my body is trying to ovulate but maybe didn't? Help please