Not sure if I had this or not, there seems to be a small gap in my gum behind my 2nd molar on the bottom left but i can't see well enough in the mirror to see if it's a wisdom tooth trying to surface. I had a very mild pain when i moved my jaw on the left deliberately but that was it. It's disappeared now though so no idea whether it was my wisdom tooth or not. I doubt it was an abscess because the molar in the surrounding area is perfectly fine. I'm 18 too I hear they start coming out around 18-22 or something.