Cd39 bfn and still no period?

Whats going on :(! I'm never late I'm having a few symtoms (sore nipples, bloating, sickness) took 3 tests between last Tuesday and today but all bfn!! I'm having a lot of cm thick and milky! 
​DB is saying I'm not pregnant and I'm just late :( any advice ladies ? Anyone experienced this and got their bfp