Ovulation pain

Did anyone get ovulation pain whilst on femara/letrozole. Am having heavy feeling, twinges and few cramps. When i sit am ok but when i stand it feel a bit tender and bruised and tmi a bit constipated. Its nothing unbearable but its so annoying despite the fact i had (3 days of positive opk) first pos was friday. 3rd month taking it and first month of doin 3-7 other months was 2-6. Unmonitored 5mg. I ovulate on my own normally