I just pounded a wooden garden stake into the palm of my hand, going for a Tetanus booster tomorrow but how can I ease the pain now?

I was tacking down my garden fence when the stake I was pounding split and punctured the palm of my hand quite seriously.
It bled profusely and I cleaned it well, put an antibiotic ointment on and wrapped it until I can get a tetanus booster tomorrow at a walk in clinic as it is a Saturday.
It is killing me right now and I wondered if soaking it in hot water or icing it might help. Do wounds respond better to heat or cold?