Fortunately you can rule out LDN, because based on what you wrote this started weeks before you took it.

Are you perhaps dehydrated? I know I am, despite drinking lots of water. Recently I learned that drinking copious amounts of water may not be sufficient, because the water may not be transported to your cells due to an electrolyte imbalance. Essentially, the water is just passing through you. This can be corrected by putting a tiny bit of Celtic salt (or any high mineral count salt) on your tongue before you drink water. I started doing this recently and I think it is helping me with the weak feeling. I need a bit more time to know for certain.

http://explainedhealth.com/how-can-t...rb-more-water/ A fairly good article, except for the Gatorade plug.