4 weeks late and 3 negative tests????

Adair • Ig: parmaadair

So I will officially be 4 weeks late tomorrow (Tuesday 18) and I just took my 3rd negative test! I am so frustrated because I have been tired and nauseated for a while now and have also had some implantation bleeding just a few days ago that I am 100% sure could not have been my period. I am very frustrated because my old obgyn retired late last year and I don't want to establish a new one because we are going to be moving in less than two months and I will need to obviously get a new dr there. Has anyone had any similar experiences??? Or advice? Thanks