Knee hurts a lot?

Hello, about 2 hours ago on the way home from school I skidded sideways on a curve with my bike.

I have a few bruises on my leg, but they're not really a problem. But now comes the real problem:

The inside of my knee is quite swollen, still hurts a lot after two hours, and tingles strangely from the inside (->I don't know how else to describe it)

When I bend my knee it hurts even more.

I think it's a bruise and I don't know what to do. If I try to ice my knee even a little, it hurts terribly.

I would rub Voltaren on my knee, but I have some abrasions there.

What should I do now?