Pregnant or no?!

I'm 11 days late on my period. I did stop taking my bc pills during the first week, and had btb for 3 days and did not keep taking the birth control. I also have been having unprotected sex throughout out the month, with no withdrawal. I got a bfn today. Could I possibly be pregnant and its not showing up right now? Or am I skipping a period due to stopping my bc pills? (I have had pregnancy symptoms, but some of those symptoms go along with BTB as well, but the symptoms have continued two weeks later..) Someone please just give me some advice!!!!