Ovulation..

Hello, so I took an ovulation test on Sunday which was the 31st . It was positive. But one line a bit fainted... But it was definitely positive.. So yesterday June 1st I had dark brown spotting.. It stopped.. Now today I have light pink spotting .. I am not supposed to get my period until June 13th.. What could be going on? I had sex.. During my ovulation times and had sex today.. And I am having a bit of cramping also.. What could this be?