Okay so this is weird, but me and my ex-boyfriend had dry sex for about ten minutes. His penis was around my vagina, but never went in... is there a chance through this that I could be pregnant, and if so, how early will I start showing signs?

So even if it pre cummed around that area, I my chance of getting pregnant are slim?

if you never had intercourse the chances of you being pregnant are lsim to none. The sperm has to actually make it inside and up to the egg for fertilization, and it needs to go with force, no intercourse = no pregnancy.