Lines in gum between canine and first molar

[Koronakesh]

I woke up this morning and had two lines in my gums, going vertically in the gum between my canine teeth and the first moral. It's the same on both sides, but here's a picture. My gums were bleeding slightly when I brushed my teeth this morning, but that might be because I was being slightly rough with the electric tooth brush...

Picture: http://puu.sh/5TBfg.jpg

I haven't been able to find anything that looks similar and I wanted to make sure it isn't gum disease or something of the sort. It isn't painful to touch and my teeth aren't moving or anything, but it feels like there is a slight indention in the lines.

Any ideas what this is?