Hope you're feeling better soon. You said magnesium does nothing for you ......... and the vitamin C doesn't seem to be working at the moment either. Have you tried epsom salts in a big glass of warm water? Sometimes warm things will get the plumbing moving - and the epsom salts, although just magnesium might work better than just a magnesium pill since its already disolved and stuff? Boy --- magnesium gives me a thorough wash out! I can't imagine it not working like that for everyone.
anyway - sorry your feeling yucky.