14DPO and got a BFN using first response...?

tested yesterday @ 13DPO and got a BFN. BUMMED! i feel my period coming, but nothing yet. has anyone tested BFN w/ first response so close to your period due date and gotten a BFP? i just know first response is 5 days sooner, and if it didn't pick it up at 13DPO then i'm probably not, right?!? ughhhhhhhhh! thanks ladies! :)