No peace of mind...

I have dry hump with my boyfriend & he has cum only if i give him a hj, but i still stress on sperm getting me pregnant over clothes or underwear & I've heard that it can happen or that it can't & I can't get no peace of mind & i know that by venting this way here someone is gonna be all rude about it. I never got teached things like this & idk how to teach myself either