ovulation question

I'm not sure if this is the right spot or not. But the last 2 days I've had super stretchy egg white cm but the ovulation tests were completely blank other than the control line. Today I had no egg white cm but the dye is starting to show up and it's getting darker. My question is does the stretchy egg white cm mean ovulation is about to happen or has the egg already been released? I thought stretchy egg white cm meant most fertile?