Hi, I had unprotected sex around 4 weeks ago. I feel so weird. Stomach pains, gas, peeing a lot, having a hard time eating to where I don't even want to try and I'm so tired but I can't sleep. Now I'm having blue veins on my breasts. But I'm bleeding now sometimes brown and sometimes red. It started the day before my period was due and don't know if I could still be pregnant or not? Help please