Pregnancy Info HOME

I had my last period on Feb. 25th 2014. According to the app I have downloaded on my phone, I ovulated on March 12th, but I think I ovulated on March 6th. My fiance and I have baby danced on March 1,3,4,8,10,11,12, and 13th. I started spotting on March 16th. It was light red, then a hour later it got a little heavier but not by much. I have little clots, and then a few hours left it was a light brown with no clots. The blood was not heavy enough to reach the toilet, it barely reached my pad. The next day March 17th, had no bleeding at all. On March 18th, I had bright red blooding that slowing turned into light brown and once again it barely made it to the pad. I also had a little bit of cramping. On March 19th, I have no spotting, no cramps. Today, March 20th, I have a little bit of spotting but not much. The spotting is a every of day thing, On my app, my next period due is the 26th, but I also have irregular periods. So my period could come at any time. I took a test today, and it was neg. Does anyone know what could be going on? Could I be pregnant?