your doctor is not lying to you.
your report says you have MINIMAL evidence of osteoarthritis at your 5th
lumbar vertebra and first sacral vertebrae.  This can be a very common
finding -- again MINIMAL evidence of osteoarthritis -- and your doctor is
telling you that this does not explain your pain.  Your "disks" (the soft,
fleshy areas between your vertebrae) are not herniated.  There is no
narrowing of the bony canal that surrounds your spinal cord.  You basically
have a normal MRI.

(http://www.britannica.com/ebc/article?tocId=9390471&query=fibromyalgia&ct=)
.

Degenerative changes in the spine are completely normal, and yours are only
mild - a consequence simply of walking upright for 30+ years. Most
importantly, there is no sign of disk herniation or bulging. It's a
completely normal MRI for someone over age 30 and the report says that your
symptoms are not a consequent of disk disease.

Since your spine is normal, your symptoms are most likely due to muscle
problems, and these are not diagnosable by MRI, only by physical exam.
Fibromyalgia is a sort of wastebasket diagnosis that results when all other
causes of chronic pain are ruled out. IOW, you have pain in the
musculoskelatel system, and the skeletal portion appears to be normal,
meaning therefore that your pain is muscular.

If you have doubts, get a second opinion by having your MRI read by a
different radiologist.

HMc

L stands for lumbar (lower back)
Anatomy : http://www.eastbaychiropractic.com/which/howtheyconnect.html
http://www.espine.com/normal_anatomy.html

You're kind of young for degenerative disc, however I never had an MRI (so who
knows what it would have shown).
I did have sciatica when I was 19.  Now that can be painful !
I also now have degenerative disc higher up. That hurts in certain positions like
leaning in towards a monitor or standing at a table in certain positions.  Raise
yourself or what you working on. Lower one, raise the other.  If the back hurts,
back up to a wall and stretch your back "backwards" until you feel relief.

Either one is treated conservatively, that's why the doctor can do nothing, it's
you who has to made adjustments.
If you've extra weight, cut back on each meal. The thinner you are, the better
for your back.
Watch your posture.
If you wear shoes that put a strain on your back, buy better ones.
Bend (especially to lift) from the knees, not the waist.
Exercise and physiotherapy to strengthen your back muscles.
If you do have sciatica, treat with heat or cold and mild pain medication.
Don't lay idle for long periods. (other than for sleep).
Check your bed/mattress, there might be a better one for your back.

There's tips here and they vary on each page. Use them well.
http://www.medicinenet.com/degenerative_disc/article.htm
http://www.umm.edu/spinecenter/education/degenerative_disc_disease.html

You won't die from it, many people have to learn to live with chronic pain.
Just do what you have to, to make it better.

They usually prescribe antidepressants for fibromyalgia.
The theory goes, if the person feels better, they'll get moving and do what I
describe above.
Another type is Elavil, which enhances sleep.  If you're not having sleep
problems, leave that one alone.
It can cause people to have sugar or carb cravings and put on weight.

Stretch, stretch, yoga or one of those, swimming, keep moving.

If your work is physical, look to the future and start looking into education for
a different career in case this condition worsens.  And/or look into ergonmics
(furniture or work equipment).

Take care of  your back.
J