Hi, so my last period was the 25th March. I have had unprotected sex with my boyfriend multiple times this month but we have now split up about a week ago. I slept with somebody else on Saturday night and today (Monday) I have a very very faint line on a cheap pregnancy test. Now I am pretty sure if I am Deffo pregnancy my ex would be the father? is there ANY chance the faint line could be from the 2nd person? if I am I NEED to be sure it's my ex. Am I right in thinking it wouldn't be possible to of got pregnant on Saturday and a test show positive two days later? Tia - very stressed x