TMI: Could this be Implantation Bleeding?

Tania • Trying to lose weight before TTC
My period is due on Feb. 3rd, and I just felt mild cramps and went to bathroom -- been having lower back pain since O day.  Here's the TMI pic and my calendar and a tweaked test this morning which I felt unsure the starting of something (and I'm usually tough on myself in regadts HPT, but this one really got my attention).

Vote below to see results!