Lots of symptoms, getting worse?

For some years now, I have had a build -up of symptoms.I have seen Drs. for many of them. The problem is they always think the many symptoms are strange, then after a few tests, they give up. I have an HMO. I almost always have normal tests, but I think they need to do some more advanced blood-work. I know there is something wrong. Things started slow and worked up to what is happening now over several years. I see a chiropractor and a ND.for a restricted diet program because the ND.discovered several food allergies that my Md. did not think were significant.
Here is an example of some of my many symptoms:
Migraines, since childhood
weak immune system Longer duration of viruses
heart murmur and palpitations MVP
Fibromyalgia
pain in arms, legs, wrists
ruptued disks in lumbar, with no apparent trauma
muscle cramps legs, one is very bad
dizziness and spacing-out few times a week
funny twitches in eyes dr. says vision is good
and the latest one is short term memory