Sacroiliac pain, and leg function loss

I am a female-age 55.  I have these undiagnosed symptoms, which have been getting worse since 2001: 1-Aching stiffness across the whole back of my sacroiliac, that is now spreading forward into my lower pelvis;  2-Feelings like a band of tightness around my upper chest, (I can not turn over in bed); 3-Stiffness in my neck and at the base of my skull;  4-Momentary pulses in my head, with vision darkening; 5-Inability to walk too long, because weight bearing causes leg muscle pain and heaviness:  6-Disability:  I can nor kneel down and get up.  I can not walk on my toes.  I can not stand on one leg. 7-I feel very ill every single day:  I have morning stiffness: The hair has stopped growing on both legs;  I get itchy rashes on my chest that last less than an hour every day.   This is what the doctors found so far:  Blood tests in 2008; (CBC, MET, TSH, and TB, all normal. ANA by EIA method, low positive. Doctor said it did not mean anything.)   X-rays in 2003:  Osteoarthritis of hands, knees, ankles, and spine.  MRI of neck and lumbar spine in 2005:  Multi-level degenerative disc disease, with foraminal encroachment.  Facet disease.  Mild stenosis (cervical and lumbar.)  Physical therapist visit in 2007:  Joint hypermobility syndrome, kyphosis, mid-thoracic joint dysfunction, sacral pain and sacroiliac joint dysfunction.  She also said I was ½ inches shorter since 2005, and could have osteoporosis.  She assessed me as 46% disabled, but did not know why?   At my last doctor’s appointment in March 2008, I wanted to know what was wrong with my WHOLE spine, and sacroiliac area?  And I wanted to know WHY I have loss of function in my legs?  The doctor said the stenosis was not bad enough to cause my symptoms, and that I “wasted his time.”  He asked me if I was depressed.  I told him the pelvic pain had become severe, and he ordered another lumbar MRI to “see if anything changed.”  I asked him to take an MRI of my pelvis, and he refused.  I waited two weeks, and the doctor never told me the results, so I purchased the MRI report from the medical records department.  The MRI of lumbar spine in 2008 showed:  Multi-level broad based disc bulging;  Borderline stenosis. And several benign hemangiomas.  (What is this?  I did not have them in 2005.  Could I also have them in my pelvis?  Could that be causing the pain ?)  Please look at the whole picture and tell me what else could be wrong.  Should I demand a pelvic MRI?  Could I have thoracic or sacral nerve damage?  Why do I feel so very ill?