So ive been whitening my teeth now for 2 days with whitening trays, and im worried that ive wasted my money on the product because there really isn't much change with my teeth...The package also says that you'll notice change within 3 days. But i dint see that happening soon. And also its suppose to be a good product if you have sensitive teeth but i used it and my gums started hurting alot and there was like a infection starting on my gum that turned white, and it hurts. What does this mean? And will my teeth get whiter?

Thanks (: