Late Period!!! Negative Result?!?

Ashley

Hi, I’ve been having my periods steadily on the 7th for the past 3 months. Well today’s the 10th and I still have no period. I have tested 3 times. One day before my period, the night my period was a full day late, and the second morning it was late. All were negative and before I spend more money buying tests I want to know want anyone thinks??? It’s my third day late. I’m just more confused about my body than anything.