Hi all I was wondering if you could give me some answers/advice.

My upper left tooth in the very back hurts in the gum area sort of above the tooth. It doesn't ache, but it hurts/is really sore when I put pressure on my gum above it. It feels a little swollen on the outside gum portion too. A few months ago I had it filled, and I can't remember if it was sore before that or not. I asked my dentist about it and he said it was probably just a scratch or something on my gum. But that's been about 2 or 3 months ago, and the pain is still there when I put pressure on it. Sometimes it gets really bad and hurts when I press up against my tooth with my tongue or something, but not often. Also, i'm 17 and i've had quite a few teeth pulled before so I have plenty of room for wisdom teeth to come in. It's more irritating than painful, and I was just wondering if it's cause for concern or if I should bother going back to the dentist. Thanks!