Mild cramps!!!!

I am TTC,i bought my ovulation test and i got positive results on Wednesday and Thurday but i started having mild cramps yesterday on Sunday which means 2 days after my ovulation and i suppose to have mild cramps normally the day before my periods or the day of my periods!??am confused why mild cramps now or does it mean my periods are coming soo soon .Does anyone ever experience this?Thanx alot