Ovulation cramping?

So the 20th was the day I had cramps and it was the day after my high peak day according to glow so I'm assuming I ovulated that day. I was having slight ovulation cramps so I was like OK gotta BD :) but when we we started the cramps got worse to the point where I was in tears. The further he went in the worse the cramps got. I've never had this happen when ever so I was wondering if anyone had any insight as to why or experienced this before.