If it is anxiety and I have accepted it,then why is it still present??

[Maria90]

Still dealing with these symptoms 8months on!!
Some symtoms have gone but others still lingering
When all this started I was stuck in bed with multiple symptoms.
All I wanted to do was sleep! I even lost my job

SYMPTOMS:
Muscle twitching
Itchy feelings in body
Deep burning feeling in upper back/shoulders and sometimes neck
(Made worse when sitting for long periods of time or doing activities)
Left shoulder/arm feels heavy
Feel fatigued
Trying to catch my breath/yawning
Stupid songs stuck in my head every damn day/all day!!

I had sooo much more but this is what I am left with.

I have had tests etc. All come back negative.
Doctor says anxiety because they could not find anything
Especially that matches these symptoms

Ok, so if it is anxiety. And I have accepted it. Then why hasn't it gone??

I am just sick of feeling like this everyday!
Has anyone had these symptoms?

Thanks