Big O symptoms

Sooo I had AF May 23-25 super light nothinggggg like a normal AF to me. Me and my boyfriend been bd literally all the time . According to glow this is my fertile week and tomorrow is the BIG O but yesterday I had the worst cramp on my left side . So bad I had to put a heating pad but that didn’t help .

Have anyone noticed cramping around BIG O ? Posted my calendar that I screenshotted yesterday