Does give you this?

I recently performed oral on my girlfriend on two different occasions,and about three to four days later my mouth started to feel sort of soar. This makes it hard to eat,and drink because I have to chew carefully,so that i don't over work the soar/stingy feeling in my mouth. Drinking something cold will cause a little sting too. So i check it out in the bathroom,and my top inner lip is developing these small goose bump sized pimples,right at the top where my gums are. Anybody else ever get that? Am i just paranoid? Im very worried,and praying its not a symptom of the three letter abbreviated disease.If so (hopefully not) How do I come to my girl with this? Because Ive never cheated,so this problem would stem directly from her. Any one with any legit ed,or medical experience please help me!! Im only 20 im too young for these types of problems.