Yes Kathleen the diazepam does help for a few hours, I also try to get out and maintain as 'normal' a life I can with the help of the pills. I tend to be more aware of them if I am sitting, or lying down, I guess dwelling on them doesn't help. Morning is the worst time, and like you find around 9pm they settle down, only to start up when I go to bed and waken up.
I have mentioned diazepam in a few of my posts, I came across an article which I posted on here somewhere entitled another interesting read. While I am aware this is an addictive drug with terrible withdrawal symptoms, IMO if it helps certain people to lead a normal life then why not take it. The article I posted relates mainly to people with panic disorder who do actually need these drugs long term to function. I find I get on better with them than I do AD's, (which I believe made me agoraphobic years ago) we are all individuals and what suits one person may not suit another.