Opk help

Malory

Is it normal for the opk to go down slowly but stay positive? I’ve heard you’re not supposed to take anymore after you get a peak result but some say to keep testing to find out about when your surge drops. I got my first peak result on the 27th (that’s the clear blue digital line strip so I could keep track of it) then got even darker line opks later that day and the next, I also had cramping on the 28th and a spike in bbt the next morning so I’m just waiting for the opks to get significantly lighter and they don’t seem to be, is that normal? I don’t have a picture of yesterday’s test but it looked the same. I also took my last digital opk and got a negative result last night.