BFP but super nervous for another Chemical..

I got my BFP on 15DPO.. that was the first day of my missed cycle and the first day I started having any symptoms. I had a chemical in 2016, took 3 rounds of fertility meds to fall pregnant in 2017, been trying for over a year now, and had another chemical in February of this year. So I am super nervous and praying this sticks! The top was 15DPO and bottom was 16DPO. I have called my OB and had labs done today. The past 3 times I have been pregnant I got BFP around 9DPO, but not this time.