I'm not sure why you think this is an STD, but no STD would cause these symptoms.
You might have acid reflux/GERD, anxiety, asthma, allergies, or a whole host of other things. The only way to know for sure is to get it checked out by a doctor.
Did you have an STD risk? The only way you'd have an STD in your throat is if you performed unprotected oral sex on someone.