"But what upsets me of course is the way she acted, talking about diagnoses after just two sessions and then leaving me by with thoughts and worries."[/QUOTE]

I think it was unkind of her to do that. She doesn't know you yet so to leave you with that opinion of hers without knowing how you'd take that (and most people would feel pretty unsettled over being told and then just left with the idea that they might have a particular disorder) was quite clumsy of her I think. If she really wanted to make this suggestion then I'd have thought it would have been better at the start of the next session so you could talk it over together - preferably with some extra time or offer of phone/email support if you needed it.

If you are feeling very unsettled and upset can you contact her before your next session? I know some Ts allow between session contact.