Fwb gave me an STD and I’m in shock

This morning my fwb texted me telling me he got an chlamydia from another partner he had to that was still intimate with their ex. We had sex at the end of November. He apologized and asked me to let him know what my results are.

My and my fwb have only had sex 3 times the last time before the most recent was in May….

Honestly I have no one to talk to about this and if I was up to me I would avoid this duration and ignore it. I feel disgusted and frozen.