First month off BC, pregnant?

Taylor
We are rounding out our first month TTC. According to the app, my ovulation day was expected to be the 30th, but my OPK, while dark, was not as dark as the control. My period was expected yesterday but did not show up. I did am HPT this morning and it was negative. Could my birth control just be making it all wonky? I already had my first period off it.