TTC Newbie

Amber • 🐶💙

We just had our first month of TTC and I should have gotten my period this past Friday but it hasn’t come. I took a test today and it was negative. It should have shown up by now if I was right? Then my next question is if my period never comes this month then when do I know to start using my OPK? I’ve been doing my BBT but after being on birth control for 15 years I guess my body is all out of whack. Can someone help me get organized?