Yrs ago developed insomnia over key customer presentation took weeks before could sleep normal again is this anxiety disorder?

It isn't that simple: A number of criteria need to be met to make diagnosis of one of the anxiety disorders. There isn't enough info to do that.

Anxiety disorder: Its completely normal to be anxious prior to some career changing event and if you are back to your normal pattern of sleep, there is no anxiety disorder. If you find yourself more and more anxious with simple daily events, you should talk to your doctor about your concerns and obtain the appropriate referral.

Reactive insomnia: Reactive insomnia is very common and it is always temporarily as the trigger factors are... Glad to know you are doing well...