I would google it to see what else you can do. I would have thought that alternate cold and warm/hot wet face cloths would relieve the swelling and the pain. If in doubt a doc could check your eye out, perhaps even an eye doctor to make sure you have no eye damage.
The last time I had that I was about eight years of age and going downhill too fast on my bike trying to keep up with my friend. I got wheel wobble and went over the handlebars and got a black eye. It lasted about 2 weeks. In my case the road was flat so there was minimal intrusion into the eye. In your case a foot in the eye is more intrusive.Ouch.
Expect skin color around the eye to go from black to purple to yellow to normal in about a 2 week period. Ouch. You have my sympathy.
Is there a doctor in the forum?