I wasn't having much trouble (occasionally difficulty getting to sleep "early") with caffeine until I started hanging out with a new friend that likes Starbucks so I was adding one of those on to my normal amount of coffee and that wasn't good! Now I just back off one of mine if I'm going to be going out with her in the morning LOL.

I always assume I'm doing something wrong to make my body react a certain way rather than that my body is having problems that it's giving to me. So, I look and adjust "me" instead of going to a doctor or anything to have my body looked at.