Please help me :(! I'm only 17 :(?

Okay so exactly two weeks ago me and my boyfriend fooled around. There was rubbing, no penetration (he had underwear I didn't), and no ejaculation. A few days after I had a single spot of a little bit of dry blood on my underwear :( and that terrified me :( then on Tuesday I started having EWCM and then yesterday I stopped but today I started again. Could that be a pregnancy symptom?;( my period is also really irregular so I don't know when I would miss it. I can go 2-3 months without one and my last one was May 11. What are the chances I am pregnant? I know I was stupid but this is never happening again!