Hydrogen peroxide caused white spots

Vanessa

So I brushed my teeth with regular toothpaste then flossed then rinsed my rinsed my clean toothbrush with hydrogen peroxide (I heard its good for teeth whitening ?) And now there's a few white spots on my gums it kinda burns not bad just a lil uncomfortable

Just wondering if anyone had gone through this, knows what it is, or will it go away???