I've been on birth control for almost 3 years and two months ago decided to take a break. When my 2nd month period was ending, I began taking the pills again, and I've been doing so for about 10 days. 4 days ago I started bleeding again and still am, I don't kmow if it's a period or spotting or what, but I just had unprotected sex with my boyfriend and I don't know whether I should go buy plan B or not? Please help!!