plan b (sorry might be tmi)

So me and my boyfriend had sex and the condom broke and he did finish inside of me I stop taking birth control not to long ago cause it made me depressed I got really scared cause I'm to young to have a baby so I got plan b and I took it about a week ago and I've started spotting it's been like 3 days with brownish blood discharge coming out now and I don't know if that's normal or if I'm pregnant and I'm really nervous and scared