no period, but BFN...??

[popsicle1985]

Evening all :)

I was expecting my period on the 14th Jan.

I did a pregnancy test on the 14th and then on the 17th...both BFN.

I stopped the pill on Dec 12th. I had a withdrawal bleed on and off until 24th Dec.

No blood since.

Confused as to what's going on? Could I still be pregnant? Is it the pill messing up my cycle?

Thank you xx

PS: I've also got really sore boobs today ):

AND I fainted after exercise today...dunno if its relevant? x