Question about pregnancy test

Destiny

Okay so I missed my period in March so I decide to take test in April and I had 4 positives but anytime I went to the doctor they came back negative I was wondering how rare it is to have false negatives on clear blue they weren’t out of date either and I did slightly bleed in April but it all stopped that day and now I’m missing my period again when it was supposed to show up on the 13th of this month what should I do I’ve been to the ob but they didn’t seem to help me out that much I’ve also spoken with my doctor and nothin also my hcg when they did the hcg quanitive came back abnormal