IUD and pregnant?

Has anyone ever had an iud and gotten super nauseous and found out that you are pregnant?

I have been super nauseous these past few days. So nauseous I almost throw up but don’t. I know it’s rare to get pregnant while you have a IUD but I know it is possible.

I have taken tests in the past when I thought I might be pregnant but always comes back normal. This is just the most nauseous I’ve been and not thrown up. I don’t know what it could be.