Hi, so i am 19 years old and had sex with my boyfriend without protection a few days before my period, maybe a week. I am on my period right now but it isn t the same as normal. I usually have a light period and it only lasts for a few day, 5 at most, the first an second day I bled normally but for the last few days I have been bleeding brown blood very lightly. I haven t even used a tampon because it s that late. Could I be pregnant?