I am a 13-year-old male. I tried this relatively cheap BleachBright StarBright Dual-Action whitening pen. After using it, I noticed white spots forming all over my teeth. It was the weirdest thing. I have always had white spots on and off throughout my life, but after using this, I had a bunch of them appearing within five minutes. Is this an allergic reaction? How do you recommend I get rid of them? Should I consult my dentist? Should I continue using my whitening pen? Of note, I am currently on Guanfacine.