Help please

idk how many of you may have had this happen before and maybe not, i just need some opinions. So lately when my so and i have been having our us time when he finishes inside it literally make my uterus feel like it is being stabbed it is honestly the worst stabbing cramping feeling ive ever had. Literally bursting into tears. Everything is great until the very end. When were done after he comes it starts throbbing! Has anyone else ever had anything like this happen before