There's a ton of stuff on the Interwebs about this.
I have had this condition, actually about three times. The latest was a mild flare early in the summer.
1. Take it easy for a while.
2. Ice therapy can help, as can ibuprofen and stuff like that.
3. Stretching can help. My therapist likes stair stretches.
4. I had my cleats back as far as they would go. My therapist suggested I move them about half-way up the shoe. I did it and it really seemed to help.
But I didn't even sleep in a Holiday Inn Express last night. That's just my own experience.
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Momento mori, amor fati.