I hear your pain!
At night I would have 1-1.5 tsp natural calcium ( lifestream brand from healthfood shop) mixed with a little water at the very last moment before lying down in bed. Its like drinking chalk but is very benign & additionally good for mum & bub. I too dragooned every pillow in the house & DH got to use some decorative cushions...
Rennies were my relief during the day, I tried to use them sporadically but by the last few months I munched a heap of them. I think they have lower levels of active ingredients than the others on the market.

I hope you can get some relief xx