Missed period. Bfn. Help!:(

Sqsq

My last period was from 26 Nov 2015- 1st Dec 2015..hubby and I BD before and after when we got a positive opk in dec.. Today marks CD 41..6 weeks pregnant if it's positive. However, the pregnancy tests keep showing bfn... My period has been regular...

I'm waiting for either period or hopefully, bfp. What should I do? I'm feeling very tired and extremely bloated :(