STI worries

I'm terrified that I have an STI. I have no real reason to be worried, I haven't had unprotected sex with anyone with an STI but I recently found a guy I completely love and we're together now. he performed oral sex on me and we had protected sex and I'm so scared that I've given him something. I went and got tested today but I may not get results for 2 weeks. I'm terrified I'll get a positive result, how would I tell him? I'd be so embarrassed and I'm worried he wouldn't want me anymore. I'm so stressed and don't feel I can tell him why, I don't want to bring it up invade I get a negative result