I have constant headaches, and i am drowsy and lethargic almost all the time. I want to sleep all the time even when i do nothing feels right. I find it difficult to think clearly and when people talk to me i barely catch-up. The headaches mostly occur on the back of my head and my eyes seem heavy. Other things that i have noticed in my body include memory loss, lower-back pain and i have weak and damaged teeth almost from my childhood. Yeah that seems it.