Pregnant?

Katrina
Me and my boyfriend were having sex and the condom broke. He had not ejaculated yet, but I know precum can still get you pregnant. I'm not on birth control, so I took Plan B a couple hours later. My period started the next day, but I was already feeling it coming, so that wasn't a surprise. Since then I haven't felt much different, I'm just a lot hungrier then normal. I feel like I'm not pregnant, because I took Plan B, but there's a little piece of me that is scared I still might be. What is the possibility I am? I'm too scared to take a pregnancy test, I dont even know what test to buy. I feel stupid even asking this question.