Swollen Gums with Braces?

I've had braces for several months now and noticed that my gums have gotten really swollen. I went to the dentist's office and they just said to brush better. Well, it's been a few weeks now and I've been using Crest Pro Health Mouthwash and toothpaste, yet the swelling has not decreased by any noticeable amount. They don't bleed when I brush, they seem normal other than the fact that they're a really bright pink and "squishy". My dentist didn't act as if it was something incredibly serious, they just said to brush better. I've been brushing three times a day, using warm salt water rinses and all of that, but to no avail. I just want to get rid of this! It's gross and I don't like it at all!