http://www.pamf.org/teen/health/femalehealth/discharge.html
This is a site I researched awhile back concerning discharges.
‘Spotting Blood/Brown Discharge: This may occur when you are ovulating/mid-cycle. Sometimes early in pregnancy you may have spotting or a brownish discharge at the time your period would normally come. If you have spotting at the time of your normal period rather than your usual amount of flow, and you have had sex without using birth control, you should check a pregnancy test.’
It is possible to have your period while you are pregnant, my friends mother had that problem.
I just wanted to take a second to mention this to you. The pull out method doesn’t work for a couple reasons, but the main one is this hon: Pre-ejaculation. It happens mostly once or twice when a male is having sex or even just by himself. Yes, pre-come does contain sperm.
I’ve also read and been told by various people that cramps, especially in the abdomen can mean pregnancy. My best advice is to go get a pregnancy test immediately!
Keep us updated, best of wishes for you, dear!