Sounds GI-focused? It's very possible that you have an infection that's creating an overexpression of inflammatory cytokines (most likely TNF-alpha). If you tend towards the irritable bowel side of things anyway (e.g. stress is no bueno) then this is fairly likely. Crohn's is a disease that's the worst manifestation of this, but overexpressed inflammation also makes a huge difference in things like joint paint, energy levels, and body composition (even when comparing isocaloric diets).
At any rate you'll need to calm the infection down first, but PM or email me if you'd like more information. At some point I'm planning on doing a series of videos about this, but I can't even do that for my own paintball products so we'll see if I get there...