Is this positive?

I've been testing for three months now and I don't think I've gotten a positive yet. It's always been close, but never as dark or darker than the test line. This is tonight's. I honk it's the darkest I've had, but not darker. I think as dark though? Taken at 4:00 minute mark, is it still valid? Ugh, these are so hard to read sometimes! 😐