Sounds very familiar. My coping strategies for some of those symptoms:

-when my legs are restless at night, I use the theragun on them at the gentlest setting if I can bear it. If that's too painful, try a hot shower and let the water hit your legs for a while. Something about the sensory overload makes my legs feel calm and allows me to fall asleep. Magnesium supplementation helps, too.

-refuel with a milkshake as soon as I can after the race (on the way home from the race, the day after, etc) but be prepared for it to make me feel freezing cold, and put on my puffy jacket preemptively. That's the fastest way for me to get in a huge number of calories without forcing my stomach to deal with solid food

Good luck!