I had unprotected sex recently and I dont know what to do, help?!

I had unprotected sex recently and I dont know what to do, help?

I know it was a stupid move, but now recently I am scared of what may happen. The partner I chose said they did not have anything wrong with them, because they had to go to surgery and was tested at the same time, and even offered proof to me.
But yet I have a feeling that I need to be tested, what should I do?

Always get tested, listen to your gut & practice safe sex the next time, it weighs a little less heavy on your mind