I’m just trying to help, so please don’t take this the wrong way, but what are you eating and drinking? It could be “healthy” stuff or it could be crap making you feel this way. My best advice is to try and figure it out now, because it won’t get easier. Food sensitivities seem to be brushed off because they’re not bad enough to kill you, but the damage can add up over time.

• Start with removing the crap
• See a good nutritionist or study up from the Mayo clinic or Cleveland Hospital sites, they have a lot of good info.
• Drink a lot of water no matter what you do
• Watch your caffeine intake, you have to be consistent if you’re going to have it.
• Since your muddy headed, it might help to go on nature walks. It doesn’t have to be a long time, just try to get outside.