I had unprotected sex twice Saturday once in the morning and once at night I also forgot to take my birth control that day and haven't taken it since. I know people say that don't discover they are pregnant till like 3 weeks later but I feel like I have symptoms. I was ovulating when I had sex and 'Im scheduled to get my period March 18th. Sunday I didnt feel anything but didnt sleep at all, Monday I had cramps and back pain very tired also. Tuesday when i went to the bathroom when i wiped there were little specks of pink and i had a headache. Wednesday when i wiped it was brown and i was still cramping and a headache. Thursday no cramping but started bleeding, Friday (today) still bleeding no cramping. I bought pregnancy tests but dont want to take them till Its been at least a week. Has anybody every discovered this. I heard it could be implantation bleeding which people mistake for a period sometimes, btw my bleeding went from light to mild to stopping back to light. Please help me.