So my period wasn't due until the 30th of this month, my boyfriend and me had sex last Friday and he finished inside me. Monday morning my period came down, my periods always last 8 days and they are heavy and very bright red for 6 days and stop up the last 2 days. Now I'm only on the fourth day and my period is light as hell, no bleeding, it's like water like and it's a light pink color and brown but again it's literally water like.. & it's barley anything at all there. Not even like period discharge.. & my cycle has never switched on me. Is it possible for me to be pregnant? Or is that not possible???