Had a tubal in 2009 during my 2nd c section. Periods are always normal. I use mymonthlycycles.com to track them. The month of July I had a period July 1st then again on July 24th. Today is Aug 6th and Ii noticed pink discharge before I went shopping. I thought I had to pee when I came home but was covered in dark red blood, that didnt look like normal period blood. ii had to change 2 pads in an hr. Could this be a chemical pregnancy?