Cd 50 still BFN 😞

Kayleigh
I'm on CD 50 and Iv done a test today BFN. I'm getting so frustrated now.
I came off the mini pill in December and got my 1st period 28th Feb- 3rd march then 1st April- 6th. So they had started to get regular and now I'm sill waiting. 
My last AF was due to turn up 1st may or 5th.
Any one else had a BFP this far on after there cycle was due to start???