wow, i'm 13DPO too. and my test is exactly like that!!
I've took 6 and they all come out the same. :">.
I'm handing a urin test into my docs on Wed morning, and i get the results back on Thurs.
I really hope it is a BFP!
and i hope yours is too!!
Lots of baby dust.
Oooo Ive just read the whole thread and Im on the edge of my seat! Good luck to you hun, finges crossed its a bfp, evaps dont normally get darker over the days so its looking good!