11 days late help!

Stephanie • Hi there. Me and my future husband are trying for baby #1. Set backs i have is i do have a double uterus and cervix.
So now I'm 11days late on my period. I took a pee test earlier last week when i was 5days late and i got BFN..... So do you think i tested to early.?? When should i test again if i still dont getmy cycle?? Plus I'm never late I'm pretty regular. Any thoughts ?