Hellppp..

Af was due on the 15th. Still no signs of her. Ttc for over a yr now. I took 4 preg test 2clear blue digital 2 first response i took all them the 11-14th.. Just because i am anxious because we had a chemical preg back in june. All those test were a bfn so my hopes got shot down but now with my period being 3days late my hopes are coming back . any suggestions or someone who experienced something like this?