What are the chances of pregnancy?

Ok,so I when I was 12 I was diagnosed with polycystic ovarian disease. I was told I would only have a 1% chance of ever having kids. When I was 19 I got pregnant with my son. I was on birth control b/c that was the only way for me to have regular periods. I got pregnant while on the birth control pill. Last year around august/september-ish I decided to quit taking my birth control. Since then I haven't had a period. I have had some symptoms like my period was coming,but no bleeding. I went on a vacation to visit an ex-boyfriend that I'm still madly in love with even after we haven't spoken in 7/8 years (he feels the same). I ended up cheating on my boyfriend(son's father) with my ex. We didn't use condoms and we had sex for about 4 days straight. And yes he came inside me. My question is...is there still a chance I could be and/or get pregnant? The way my periods were before,I would start my period somewhere within the last 2 weeks of the month. So if someone could help me out that would be nice and it would be greatly appreciated.

* and as for the whole screwed up relationship problems...I'm in the process
Of trying to figure that out and fix it. So please no flaming me. *

Hehe yeah, people on this site like to judge very quickly I've noticed.

There is always a possibility of pregnancy but the best thing to do is take a couple a pregnancy tests and see what happens from there.

Yes there is still a chance! If you got pregnant after what the doc told you and while on birthcontrol then there is more that likely a higher chance being off of your birthcontrol to get pregnant.

Yes there is still a chance! If you got pregnant after what the doc told you and while on birthcontrol then there is more that likely a higher chance being off of your birthcontrol to get pregnant.