I am on my very first pack of birth control pills of loestrin 24 and this is the third week (i have 5 pills left before the placebos) and i had sex without a condom and TWO days later i noticed dark brown, thick discharge with some blood streaked in it. i asked my mom if this was normal and she said yes, but ive been looking on the internet and some posts said it could be an early sign of pregnancy. im not completely convinced that its just spotting because its thick and heavy but not continual like a period. and it is dark brown. is this normal? even if its dark brown with blood streaks?.. i am pretty worried and i want to rule out possible pregnancy 100%.