Pregnancy Anxiety

Hi everyone, I've been having a lot of bad anxiety lately and I could use sone reassurance. I'm 17, and I've been dealing with health anxiety for about 2 years now, so these fears are normal for me. My boyfriend and I are very responsible and we have never had sex. We have been dry humping for the past few months because we both know that it's a safe way to be intimate wothout actually having sex. Last time we did it, about 2 weeks ago, we were both wearing underwear and pants. He came, and since then I keep thinking sperm sonehow got past my pants, underwear, AND panty liner to make me pregnant. I know it's impossible, but I keep thinking I'm the .00001% girl who's gotten pregnant by dry humping. I also keep having an excessive amount of white discharge down there and I usually don't. Please no rude comments, I just eant an explanation as to what my discharge could mean! Anything to ease my anxiety. Thank you!