Hello, Miss Amy, thank you for sharing your concerns with us.
Whereas it is always smart to stay on top of STD tests as a yearly medical regimen, in all likelihood, that is just the direct physical result of giving your boyfriend oral sex. Sometimes things get a little dry and the mouth and throat need to stay moist. Plus, we all know that things can get rough in the bedroom when we get excited, it is all part of the fun. :)
If you develop any further symptoms, then it would be prudent to see your primary healthcare physician, but the most you should look forward to is a bit of a sore throat, some chloraseptic should fix that right up. To minimize any physical soreness, try a flavored lubricant from your nearest adult novelty store or couple's boutique.
Take care and keep it safe.