Thanks for that Stacy.

I've learned such a lot from people on this site in such a short space of time.
Problem is, how to be assertive but not pushy with the doctor about testing, I know from experience as a teacher on parent's evenings, I didn't want a know-it -all parent telling me how to do my job, it's irritating and counter productive.
I think I have developed a good enough relationship with mine for him not to take offence..
There's so much to learn........

Karen