I have pcos, it's been two months and one week since I have had a cycle, my boobs are sore, the pregnancy test have been negative. Could I be prego?

Maybe (not) . . . Yes, if you engage in unprotected sex. But no, unlikely b/c negative pregnancy test 8-9wks after last period. Pregnancy tests are accurate as soon as your menses is late. If still concerned, repeat pregnancy test in a week.If concerned about situation repeating itself in future and you don't want to have kids now, talk to your doc about starting some form of contraception (birth control).