unprotected sex

I had unprotected sex! Could I have a STI? What should I do?

anonymous
asks:
I had unprotected sex (mistake #1) with an older guy who I don't know at all (mistake #2), but he didn't have any sores on his penis, and we only had sex for like 25 seconds, if that. If he didn't ejaculate in me and didn't have any sores, could it still be likely that I get a STD from him? He said he doesn't have any STDs, but people lie, and I'm obviously nervous....

Mandatory blow jobs and odd penile discharge

Anon
asks:
I have been giving my boyfriend "blow jobs" all through our 10 month relationship and its been fine so far, I cant say I like or enjoy it but its been ok, recently I had a sore throat and when I gave him a bj noticed that balls of hard white stuff came from no where into my mouth, I assumed it was left from my sore throat and stopped, using my throat as an excuse but it kept happening everytime I ...