can prometrium delay AF ??


Dear ladies

today is my dpiui 17, and im on prometrium and estradoil from 2dpiui, i did not get my period yet and
HCG (HUMAN CHORIONIC GONADOTROPIN), SERUM, QUALITATIVE is -ve, does it mean m not pregnant ?
i usually get my period on time if i ovulate, no AF yet
does prometrium cause AF to be delayed ? do i need to stop them or there is still hope for :bfp: :pray: :cross: ???