Please!!!! Need Some Peace of Mind!!

Been on BC pill +9mos. Just missed period for the first time. 
Took 4 HPT, all neg. The most recent one I took was w/ first morning urine 1 week after my period was supposed to start. Unprotected sex with BF.
​I have been exercising a bit more this month, and have also lowered my caloric intake. Been working harder, as well.
​I can't seem to stop freaking out... Anyone out there that can ease this troubled mind?
​Thanks!