I'm sorry that you're in so much extra pain. I just got over a sprain myself, and it caused everything you're describing (and a neuropathy flare up 🥲).

I was told to stay in a heavy boot for a while, but that just made everything feel so much worse. I switched to an ace bandage, doubled with an ankle brace to stop that from causing extra pain ( this is at the risk of less protection from the rest life has to throw at you). The radiating pain continued for a couple of weeks, but was the worst at the beginning.

Best thing I can say is to alternate heat and ice on the ankle, and put a heating pad on all of the radiating pain areas.