7 weeks late and counting

That's right. 7 weeks late and counting. I've gotten several BfNs on hPts, a couple that looked pretty inconclusive (light grey test lines), and even a negative serum test at four weeks late. I will have a few days in a row where I show signs that I'm about to hit my period, but I never do :/ getting pretty irritated at this point, so if anyone has any insight please give me a shout! Thanks :)