STDs?

Ok so I met this guy and we had known each other for a week before we were alone together. We made out for a while and I was going to give him a blowjob before I realized i didn't know him that well and I felt uncomfortable with it. His dick was in my mouth for probably five seconds and he did not cum. The next day my throat started hurting and it's been 5 days and my throat still hurts. Does this mean anything or am I just overreacting? Thanks!