Second thought. Was your energy normal before this all began? I trace my illness back to a couple of major "flu" episodes in my 30's. Based upon response to treatment, and some blood work showing past infections, I am, after 30 years of slowly declining health & energy, actually recovering with high-dose Valtrex & various antibiotics. Herbal protocols (search Buhner and Zhang for these) have also helped, although after a year on herbs I developed allergies to them. This might or might not make sense for you. Along with declining energy, I had frequent flu-like flare-ups which now appear to have been infections, since they have disappeared with treatment. But if I were you, I wouldn't rule out infections even without flare-ups. It could be that your immune system is still strong enough to keep an infection sub-clinical, but using up your energy. The easiest way to test this theory would be to just try some herbal remedies. If you herx (get briefly ill from them before getting better), or simply begin to feel better, then you'll have your answer. I used to be much more intolerant to all the "stimulating" fixes that you have talked about before I got onto these antimicrobrial protocols. It could be that the stimulating supplements were also feeding my infections---thus the reason for feeling better and then crashing. But now that I've been treating the infections for a few years (don't be frightened by this, I was much sicker than you are), I am able to handle the energizing supplements again.