Please help?

I feel like this is a far reach but here it goes. On the 30th, I took a test (top test) and today I took another with fmu. AF is due today and I didn’t feel any cramps like I normally do. I feel like I’m crazy because there’s no sort of evap line or indent on the top test even though it’s been two days, but I see a vvfl on today’s test. I’m honestly not sure if it’s actually there or if it’s an evap line or indent. It was negative and so I threw it away, but I checked it one more time and saw the vvfl. The NĀTALIST tests say to wait for 5-15 minutes and I’m pretty sure I was in the time frame.