Ice the shit out of it man. I'm sure you already know that but just in case you don't, Ice it good. I had my ankle sprained once when I was caught in a leg lock and the only thing you can really do at first is ice and elevation. You can also try some Asprin to get the inflammation down. There is also a naturopathic cream out there called Traumeel that could help.
As far as staying on cycle or getting off, I don't feel qualified to answer that.. I am not sure. Maybe base that decision on how it responds to the ice, Elevation and Asprin. If it still seems really bad in a few weeks and you cannot train effectively, go off.
Good luck.