The fact that they have accepted you for counselling shows they feel that counselling would benefit you.  Theirs is a precious resource and they wouldn't offer it to anyone they felt didn't need it .  The counsellor would soon give you feedback if it wasn't appropriate.

I have had counselling around my breast cancer experience.  You can say things to your counsellor that you wouldn't feel able to do to friends or family.  I've found it extremely useful.  

Hospital staff are excellent and supportive but their focus is of necessity on all the practicalities of treatment.  Counselling gives you the opportunity to look at all the issues round the edges that otherwise you might not have the chance to look at.

Sometimes one feels one is coping well and sometimes not.  Getting into counselling now you could look on as a good insurance policy incase things get tougher further down the line..

You could try a few sessions and if you don't like it you never have to go back...

A

Good luck!