Generally, the counsellor will work with whatever issue you bring to the session. The methods used will be decided between you, but the overall aim is to help you resolve the issue which is troubling you. This is your right and your counsellor will understand and accept it. Generally, a session lasts for 50 minutes. This depends on you and the issue that is troubling you.
Some issues can be dealt with in only one session, others require a number of sessions.
Your counsellor will give you some idea of the number of sessions required at the first meeting. As the counselling proceeds the situation is constantly re-assessed. Both the fact that you see a counsellor, as well as the information you give the counsellor, are confidential. This information will not be divulged to anyone else without your specific permission. Yes, if you feel that another counsellor would suit you better.