Hello, I just bleached my teeth with polazing cp 35% which I had ordered on amazon (from a (hopefully) reliable seller with lots of good reviews) and noticed that my teeth are quite unevenly bleached -- I now have white spots on my teeth and white stripes that run down the sides. I had been bleaching my teeth about once a month with poladay cp 35% (purchased at my orthodontist) and never had this problem. Please advise.