I am a 26 year old male with similar symptoms as well. I've had symptoms since around October of 2004. At first it was just dizziness and a few panic attacks while in college. I saw over 10 doctors up until May of 2008 when a nutritionist put me on a low carb/very high protein diet. About 3 weeks after starting the diet I started having constant neverending "panic". Nothing would help with this (Xanax used to help with the panic during the first 4 years, didn't even make a dent afterwards). I tried deep breathing, relaxation, yoga (when I felt like I could move), Xanax, Ativan, Citalopram, and others. Nothing helped.
Anyway, I've since quit the diet, and am back to eating semi normal again, but many of the symptoms that began in the 6 months of constant panic have not gone away. These symptoms are very similar to what you have described here. While it's not haunting me, the thought of vCJD has crossed my mind and scares the heck out of me. I was eating a piece of meat the size of my fist every 2 hours of every day while I was on that diet (ironically to try to help my dizziness, not my weight) so that doesn't help my "what if" scenerios.
Anyway, I also ache everywhere. To me it feels like my joints are...mad, and my muscles are weak and sore. I can totally relate to the twitches/spasms, fatigue, stomach pain (mine is around the bottoms of my ribs), and "strange" feeling that is sort of like being weak. I haven't dropped anything, but my grip usually seems weak and uncertain. I am also shaky and many times it feels like my body is vibrating. One of the most worrysome symptoms that has only developed since January is the feeling that I'm drunk. I do not drink, and haven't since 2004, but I feel exactly like I'm drunk, strange reflexes and all.
I'm seeing multiple doctors right now and surprisingly that is not helping me much. My psychologist (who I've only known for a few months) says that it's anxiety. My cardiologist/neurologist says that it is most likely a nervous system dysfunction (which is causing anxiety-like symptoms). And other doctors have given me similar conflicting info.
I really hope that it is all anxiety related and that we can recover soon! I definitely need help convincing me that it is anxiety and no one seems to know! Arg
Good luck Worriedsick, If I figure out what mine is you can bet I'll be sharing it with you all!