Weird period? Or could it be?

Codie • 27 years young, mother of an 8 year old son, and one on the way. Due date 01/09/16 Texas born, Kansas transplant showed up early friday night 14dpo.....very light bleeding though, thought it was spotting. Got a little heavier on Saturday, the day it was due, and vanished sunday, still has not shown back up. Took a clear blue digital test and it said not pregnant. Also took a $store test, 1 line. :( I feel pregnant but every test comes out negative....I took a test almost daily last week, got negatives, an what I thought was faint lines, but were probably evaps. Idk what is going on with my body or cycle. Anyone else with this problem?