It sounds like Lyme Disease to me (my husband has chronic Lyme Disease and had exactly the same problems). If you got tick bites 10 years ago, the regular Lyme Disease test won't show a positive result. If you don't get adequately treated when you first get the infection, the disease can be manifested years later when your immune system is distressed due to mental or physical stress or other health issues. Regular primary care doctors have no clue about how to treat chronic Lyme Disease, and you need to find a good Lyme Disease doctor. You can go to LymeNet http://flash.lymenet.org/. to find a doctor or ask more questions. There is a good documentary movie about Lyme Disease, and you can learn more about it at http://underourskin.com/.
Just don't believe it when your doctor tells you that it is all in your head. It is a treatable disease, although it may take years before you can completely recover from it.