Pregnant?! Ladies HELP!

My last AF was April 3rd, 2015 and I am 3 days late.. But my periods tend to be irregular when it wants to be.  The bottom two tests I took yesterday afternoon 4/5 and the top test I took this morning 4/6 . Is it possible that the lines can be this dark when Im only 3 days late? I really dont want to get my hopes up.. I had a misscarriage 6 years ago.. And im hoping its not a false positive. Opinions ladies?