Confused and waiting for AF..

So according to Glow I was supposed to have a visit from AF on the 4th of this month. My last visit from her was Feb 28th. I took several tests in which I received faint positives last week and now this week they're showing up negative. Even had a BT done today and that came back negative as well. I am always regular so for this to happen ,it's throwing me for a loop . I'm having all the symptoms of a pregnancy but everything is saying no. Help!!