I have been trying to have a baby and I've had 3 miscarries. My last period was Nov 11 and last night as I was having intercourse I started to bleed, I don't know if its my period or something is wrong, today in the morning there was no more bleeding only dark brown spots... I want to know if I'm pregnant or if its just my period?

Bleeding is common. It could have been the placenta attaching. Have you had your peroid? This post was posted a bit ago...