Gum problem? Help?

I have a gum infection or something. It hurts and it's tender, and I looked at it last night and it looked like a piece of my gum is partly off and growing like it's gonna grow over my teeth. I don't know what it is or what the cause is. But it's been hurting kinda a lot, it's not improving, I can't eat on that side, and I do have braces which makes flossing extremely difficult. And I'm not supposed to get my braces off until March 26th next year.
Gum problem? Help?
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