chances of pregnancy?

Hi. I'm 16 years old, almost 17 and I am having a huge problem. I started to date a guy 1 year ago and after a bit of time, meaning the last 3 months, we considered having sex, but we didn't do it yet. We just had a bit of fun, we came over a few times and I masturbated him a few times, I gave him a blowjob and he gave me one aswell. I was careful with my hands, I washed them everytime after handjobing him or anything else and I never touched myself near the vagina before washing, not even for going to toillet or smth, cause I know I need to be careful. I don't think he touched his errect penis with his hand before touching me in that area. I had my last period on the 7th of august, before anything happened between me and him, so we did nothing yet at that time, and it lasted 7 days and it was consistent and and our playing happened like a week later. Now I had my period again, it started earlier, on 30th of august and it's my 5th day, but it was weird this time. The whole month before having my period I felt sick, dizzy, tired, I had backpains and abdominal pain and I started to have a dark vaginal discharge, dark to brown at the beggining, it was once almost black and after that it started to came with some blood, but it was mixed, like it didn't turned completely red , it remained brown-red and it was reduced as quantity. I don't know, I suffer of hypochondria and I a really worried cause I read a lot about it and I found different kind of symptoms that match somehow the way I feel. I just wanted to know, is there any chance for me to be pregnant?