I Got Bitten On My Eyelid At Two O Clock

I got bitten on my eyelid at two o clock in the morning by a mosquito. It is now 2:20 in the afternoon and my swelling has not gone down. I have kept my hands clean and I have avoided itching it. I have even tried ice but no matter what I do the swelling has not gone down. I have school in a little over a day. How can I make it go away by school?