Swelling/tenderness on sole of foot?

I'm not sure if this is on topic but since I got this from excercising with the elliptical I'm hoping someone might help... ever since last week I somehow injured the sole of my foot, below the pinky toe, and now it's really swollen and tender... and it looks kind of pink. I've been trying not to put a lot of pressure (it hurts to walk even) on that but the swelling isn't going down.

The swollen-ness isn't that big, it's probably like an inch or two, but I feel like it's getting a little bigger... pretty much the whole right corner of my foot is really tender. When I try to massage it it feels really soft, very tingly, and sort of like there's a really big vein or a few tangled nerves or something.

Is this normal? :s What do...?

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