So on the 16th or 17th of april my boyfriend and i had sex and he ejaculated inside me. My period was due on the 19th but came on the 20th instead. I usually have a very heavy flow but this time seemed like a normal flow not heavy but there. Today 24th my period is supposed to end i did see the brown spotting but after i showered it was all red blood again. Could i have possibly gotten pregnant??