24days late BFN

A
So im now at 24days late and coming up to what would of been my next period and still nothing!! 
The last test i did where bloods from the doctor and that came up negative!!
Where do i go from here? Just keep waiting?
Go back the doctors? Start testing again? Surley if bloods where negative im definitely not pregnant!! 
Im lost and some advice would be great if possible ladies xx