Firstly months ago I had problems with my bowels, very painful cramps, vomitting etc... I also had a rectal bleed.
I had a sigmoidoscopy and they said nothings there, everythings very healthy, you bleed was down to a 'burst pile' 
So now about 5 months later, after case closed - everythings fine (no more pains or anything) I get a letter this morning from 'xxx hospital' (one of the leading cancer hospitals) saying:
You have an appointment at the clinic with Dr XZY to discuss your diagnosis and treatment, you will be met by a clinical nurse. You may have tests on the day or on following appointments and blood tests.
Enclosed is a leaflet all about the hospital, cheamo, radiotherapy etc...
So I am reeally scared that something is wrong and some wires have been crossed somewhere and theres something I'm supposed to know that I don't!
So after bringing about 5 numbers I manage to piece together that a referal was made back in May and this is just an appointment for investigations.
AIBU to think this letter is NOT worded like that and it implies they know something I don't?!
And also that if I've been told everything is OK that its odd to send this letter anyway?!