Omg I had that every night in my last pregnancy!
During the day, my eldest DD spent hours scratching my legs for me - with her toenails while chatting to friends on her phone - she's 18 yo and was happy to help 😁
Only thing that helped me during the night was lying in bed with the hair dryer blowing cool air onto my legs - I know! But it was desperate times 😂😂 and inviting DD to sit at the bottom of the bed scratching my legs while me and DP slept was not an option 😂
Some nights I left the hairdryer on all night- was the only relief where I could fall asleep for a couple of hours here and there.
DP was a saint during it all 😂😂
Ahh I'm laughing now, but I'm pregnant again, so probably won't be laughing in a few months 🙈
The hairdryer on all night wasnt the best / safest / most economical option so I'm also taking on board what pp are suggesting 😁
Good luck op, I hope you find something that works!