How can I get rid of a huge pimple very fast?

I have a huge big red pimple on the middle of my forehead. It doesn't have a head, it hurts, and school's tomorrow!

I want it to be smaller, or disappear! I put toothpaste on it last night, it didn't help at all. I just had my period , started yesterday.

What can I do without buying something? I want it less noticeable. I will buy concealer later i think.

Salicylic Acid. Clean and Clear has one.

It's like Aspirin for your skin. It makes inflammation (redness, swolleness) go away. Great for making big pimples go away quickly.