Pain during sex

Just wondering if anyone had some insight to my question. My fiancé and I waited 3.5 years to have sex and when we did, it was a bit uncomfortable at first (as I'd been prepared for), and then I had a pain where I would feel cramps during a period. At first, I thought it would just subside, but then it hurt enough that I had to stop. It continued to hurt and feel like I either had to go to the bathroom or throw up. It hurt all night long and finally subsided by morning. (Thank God!) Just feeling crampy now, and a bit off. My period is supposed to start in about 6 days. My sex drive was off the walls for a week and wasn't so much in the mood on day of sex, but I got in the mood with some help. Any thought?⭐️