Help with SSDI Process... so confused

First, take a deep breath. The Social Security Disability application process is long and complicated. More than 2/3's of claimants get denied on the initial level. In the next step, request for reconsideration, more than 90% of claims are denied at this level. The third step of the process is the disability hearing, where almost 60% of applicants are approved. This is your only chance to explain to another human being (the administrative law judge) why you think you should get SSD Benefits. This is the stage in which an attorney or advocate can be extremely helpful.

More information on Fibro and SSD

I have had back problems my whole life with painful scholiosis and such, I've worked with it though and worked from the time I was 14 till I had my twins at 27, while pregnant my back literally started feeling as though it was breaking so I was taken out of work and put on bedrest, after delivery the pain never went away and my body has basically fallen apart over the past three years, I now have the following diagnosises: scholiosis, deteriarating discs, slipped discs, si joint issues needing injections every few months, chronic fatigue syndrom, fibromialgia, chronic migraines with octicular migraines, panic/anxiety diorder, IBS, and random bowel incomtenance issues. I finally applied for ssdi last November because I didnt know what else to do, I have 3 children the twins and an older son all with autism so my husband has been cutting hours at work to help especially on my bad days. I gave social security medical records all the way back to my pedi's plus now I have a nuero, pain specialist, rhumo, gastro, pcp, and therapist. a few weeks ago the claim reviewer called and asked if I would be willing to go see one of there doctors, I said yes of course I assumed that was part of the process, she said she would check and see if I needed to and get back to me. two weeks passed and I hadnt heard so I called her, she said the case had been decided and submited but picked up by quality review so I had to wait for it to go through them.
Now I was awaiting a denial the last 5 months because from what I heard everyone gets denied on the first time, so I had a lewyer lined up and all, but now I'm confused.
Would they deny me without giving me the chance to see there doctor?
Does Quality Review look at denied cases too?
and if it was approved what are the chances QR could over turn it?
and Does QR have a time frame they stick to?

Sorry this process is so confusing to me, and the people at ss arnt the nicest when you call my local office, I swear they think I chose to have these issues and three disabled kids... ugh....loosing hope! ;'(