My gf and I have engaged in genital rubbing once, and there was no penetration or ejaculation, maybe there was a bit of pre-cum, and I've only stimulated her clitoris for half a minute.
I know it's unlikely to get pregnant that way, although not completely impossible, but we're both worried because her period is late for few days, and she is experiencing cramps along with gray or black (not brown) jelly-like discharge.
Is is a vaginal infection, hormone imbalance, stress, or is it a sign of pregnancy?
We're both virgins.