My first day of my last period was the 16th. My ovulation date was the 28th-the 5th of February. I had sex the 28th the 1st and the 2nd. My next period isn’t supposed to start until the 17th but today the 11th I am lightly very lightly spotting my period never comes on early normally comes on around the same time the 17th of each month.

Has this happened to anyone before could I be pregnant?