Can anyone tell me what the range of symptoms to an intolerance to sugar  (before you get off it) can be. I have suspected some sort of intolerance for almost 20 years  I know that an intolerance to carbs is on my list but now that I am hearing about sugar it seems to be high on the probabilty list of causes. 

Eg - can you experience anxiety and heart palpatations and nausia.

When withdrawing from sugar do adverse symptoms become more pronounced if you get a sugar hit, after you commence a sugar free diet?

Aproximately how long does it take for the body to readjust after eliminating sugars?