It took my body about a month to get used to not eating carbs. I had terrible stomache aches and head aches for about two weeks. Then all of a sudden on day they were gone. Just stick with it, trust me it's worth it. Iv'e been LCing for about 3 months, and every once in a while I get stomach cramps, I think it is gas pains. Some times if I eat too much cheese these pains come back. So I try to limit my dairy intake. Did you ever have stomache problems before LCing? Take care.