Tues noontime - just reading your woeful post. Been there a few times, good advice posted by others. here's one of the best I have: raise your cutting table by setting the legs on top of cans from your pantry. Presently I have 27 oz. cans of black beans under the legs of my dining room table - leaf extensions in place.
You might put a square of rubber grip top to reduce slippage (never had one slip w/o this step but if someone pushed on the table it could I guess). at Guild we used banquet tables (old style, heavy) and #10 cans from the church pantry. Table height does contribute to shoulder/back pain. Another thing, we have a microwaveable heat pad. Originally it was gifted me and I used it a lot, but hubby enjoys the relief it affords for his leg cramps in the wee hours.
Ours is 'Grandpa's Garden' brand, even on ebay they cost $40. plus --- there are lots of us 'boomers' creaking around! You'll be better in a couple more days - a massage if you can. Donna Bates