One brand VVFL, One Brand BFN

A

Ladies, I am 10 days post 5FET. I got a faint line last Friday and have been testing since to see if it gets darker. I thought it was but now it seems like it’s disappearing. first response digital is saying NO. All test have been taken with the same first morning urine. My blood test is not until Thursday and I can’t stop stressing. Please let me know if this has happened to you.