In need of support

Hi everyone, I hope everyone is managing as best as possible. 
I was wondering if any one experienced the same devastating situation. 
I recently advised PIP that I have been diagnosed with pots and fibromyalgia and my health had deteriated  further .
I had to attend another assessment and the assessor totally disregarded everything I stated and didn't even put i have to walk with stick because of leg pain and hypomobility in joints and balance issues. I had been discharged from hospital 2 days before with pneumonia and still having breathing issues.
I'm so devastated and it's hard dealing with pots everyday and constantly feeling your going to pass out let alone the pain with fibromyalgia. ..don't go anywhere unless it's hospital appointment and have to have someone with me. 
.I have welfare adviser appealing this for me, just wondering if anyone can give me hope.