PCOS questions

Tierdri
I found out I had pcos in November of 2015 previously the last time I had a real period without taking anything to help me get it was June of 2015, when I went to the doctor in November they started me on the pill to help start my period, I started in December and haven't gotten since. The <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> told me I was ovulating the past couple days 18th of May 2016 - 19th of May 2016. Today is the 21st and I started getting cramps like I'm going to start my period, next thing I knew it felt like I started bleeding, I ran to the bathroom and sure enough I was bleeding but very lightly compared to how it used to be when I had my period regularly. My fiancé and I have been trying to get pregnant but without a period and not knowing when I'm ovulating it made it extremely hard. We have been having unprotected sex for the past year, is it a possibility that I could be pregnant that fast if I did if it was just a couple days ago?