Is this normal

I’ve been having sex with my bf for a week already everyday n he’s been cumming in me every time. We go like 5 rounds usually n he cums in me every time. Well I’ve been feeling like throwing up for a couple of days now n idk if that means anything.. I have a iud but I’m still scared because it’s so random n I feel naseous randomly through the day it’s not all day just random times. I’m so scared.!