Bbt drop with pos opk

♥️

So I’ve had the flashy face for five days. I’ve been using fmu. In the afternoon yesterday I started cramping and got ewcm so for the first time in the afternoon I did another opk test and it came back as a solid face. So I did the deed last night. Now I don’t have ewcm and the test won’t let me take another as soon as I put another tester in it automatically has the solid face without me using the test. Did I mess up by testing later? Did I actually surge? Because I now don’t have ewcm and my temp dropped. What is going on???