Implantation bleeding?

Danni

So my husband and I were intimate twice while I was ovulating. My period was 7 days late and the day prior to the day I was supposed to start I was nauseous. I just thought it was from my period approaching. I finally started bleeding on... VALENTINE'S DAY. Before I started bleeding I was fatigued, slightly nauseous, besides the day before vday, and EMOTIONAL. Once I started bleeding I just thought it was my period, it was only heavy for one day and one night, also I had clots when it started. It got lighter today and I think it stopped?? Opinions?