My big toe has become very sore, my nail has become very brittle and is discolored a couple shades darker than usual almost a white/ light grey color. the tip or the end of the toe has become very red and painful and dry . it almost felt like the end of my toe was rubbing on my shoe at first , but when checking my toe was not even close to the toe of the shoe . It almost looks like there is a nail growing under the toe nail