My period is 13 days late. It is never more than 2 days late. I took a home test when I was about 4 days late and it was negative. I took another home test 3 days ago and nothing came up (it was the kind where one line shows up when the test is taken correctly and if your pregnant a second line comes up). I took a second test the next morning and the "test" line came up immediately and after about 2 minutes a very faint line came up in the positive window, but it was horizontal instead of vertical and was at the top of the window so I just assumed it was the top of the test strip where the urine had accumulated. I have three children already and with my first two the home tests didn't show positive until I was 7-8 weeks pregnant.

I am having no typical pregnancy symptoms (nausea, sore breasts) except I am tired a lot and very emotional, but I know symptoms can vary with each pregnancy (with my first one I never had morning sickness, with the other two I was constantly vommitting; my breasts only got sore with my second; etc.). I also just a couple of days ago started having a light amount of clear discharge with no smell, burning, or itching. I haven't changed my diet or exercise routine recently, but I have been under a huge amount of stress (however, like I said before, stress and all I have never been more than two days late).

When should I home test again or should I just go get a blood test? What else could this be if I'm not pregnant? We just moved back here from overseas (my hubby was stationed there with the US Air Force) and I don't have a doctor here yet.

Wait about another 2 weeks, then test yourself again. 13 days really isn't enough time for anything conclusive.

You could go for a blood test. See if there's any clinics you can go to in your area. If you don't want to do that, you'll just have to wait and see and maybe take a few more home tests.
Stress can throw your cycle off, even if it hasn't made you this late in the past.