missed period

i have had a period for 10 years and have never had irregular periods. was with my husband for 3.5 years and we had two babies. well we just recently split up new years and two months later i mistakenly had drunken sex with a male best friend and my period is now going on two weeks late. i have taken three pregnancy tests before today all negative and then today i took one. need opinions y'all. is this a faint positive or just an evap line? i took the picture 3 min after the test. i'm making myself crazy!