What are the odds of me being pregnant

I've been having unprotected sex, and just re-started my birthcontrol a month ago. Two days before that I had sex, and then two days after my birth control the same thing... Just a few days ago I started spotting (which has never happened before when I got on the pill) so I stopped taking my pills because I read that was the best choice and then i lightly bled for about two days. This morning I woke up feeling nauseous and had bad diarreah (sorry tmi).... I'd just like to know the odds and what to do.