Possibly pregnant??

I'm 22 & me and my husband are TTC. My period was supposed to start on the 6th. Tomorrow I will obviously be an entire week late! I've taken 2 tests, both negative! Also instead of my period it has been some sort of milky like discharge, no smell or anything. Haven't really been experiencing many of the other symptoms yet of course besides being extra moody & irritable! He keeps saying he thinks I am, but I'm not sure. Maybe?? Any advice ladies??