IUD pregnancy

I had sex a few times a little over a week ago. He finished and we had sex again without him peeing. I have the mirena IUD insertion. I got it at the end of January but never had a second check up. I checked my strings recently and they were there. I am having horrible anxiety that I could be pregnant and don’t know how to stop thinking about it. I don’t know why I do this to myself. Ugh.