hooking up

Unsatisfying sex and transitioning to college in our relationship

My boyfriend and I recently started having sex, we were both virgins. Making love to each other is amazing because we are in love but for me, I can't feel anything. I know theres a million reasons that maybe he doesn't know what to do and stuff but I was hoping if there were any suggestions to help....

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

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....