Bleeding after sex

I just finished having sex with my husband and when I came we noticed that there was blood along with the water that came out. My vagina is a little sore and I’m having very light cramping. It’s not time for AF to come and I’ve NEVER bleed after sex. I’m worried. I’m still bleeding. I have an IUD put in. I was a little dry when he first went in but we stopped and had a little more foreplay and then it was totally fine during sex. Should I go to a hospital? Should I wait it out? Please help, super freaked out.