i'm scared please help someone

hey girls, so 2 weeks ago on july 4 i took plan b because the condom broke, although he said he didn't cum in me and he immediately stopped once he realized it broke. i've been taking bc for about a year now! the only reason i took the plan b is because i'm not 100% sure i took my bc at same time every day. 3 days after i took plan b i bled and it looked like a legit period also felt like one. here i am two weeks later and when i wipe i noticed some either brown spotting or blood? i'm supposed to have my period anywhere from 10-17 days from now. i'm scared am i pregnant? or just freaking for no reason?