my girlfiend is 16, and b4 we was messing around i put on a condom and started to grind on her and insert it 2 or 3 times but i caught da organsim by grinding. me n her have been stressing from problems at school and personal family issues. she hasnt had her period for over a month. its about 2 be 2 months but 2daii she saw some dark blood in her panties. what does this mean??? i hope shes not pregnant.