Is this a chemical pregnancy, just late or body messed up????

Help please can someone answer my questions... Previous posts have been unanswered πŸ™πŸ»
I have very sensitive sore boobs and have been like this for at least a week all over and even in my armpits.. & this NEVER happens not even before my period. Ovulated 10 April BD days before and day after. But BFN for all this week & im was due on yesterday!Β 
This makes me 11 dpo today since positive opk. Periods are normal since stopping pill in December 27 day cycle.Β 
Anyone have similar experience & still got BFN or BFP? πŸ™πŸ» thoughts please!!!!