I may have been bitten by a spider?

On my pinky, for a few days now I have had a small lumpy bump near the tip, on the side. I think i can see 2 dots as well. (teeth marks?) It doesn't hurt that much, only if i were to apply pressure to it. It's not really that red, but it's little, bumpy, and just swollen around the immediate area. it doesn't stick out that far, and doesn't bother me incredibly. at first i thought i had a few splinters in my pinky somehow. but today my friend was telling me about the possibility of having a spider bite. Could it be a non venomous one? I'm pretty sure this is the second day i've had it/noticed it.