Hi, I'd like to help you with your question.
It sounds like you need a full evaluation by a therapist or a psychiatrist. Is there a clinic near where you live? If so, go there in person and ask for an evaluation. They should be able to help you. If not, you can report to a local ER and ask for help.
If you can wait for a bit, you may want to consider switching your GP to another one. Not feeling listened to is one thing you should not tolerate when it comes to getting medical help.
Can you tell me what makes you feel you have Bipolar disorder as opposed to an anxiety disorder? What are your symptoms?
It certainly sounds like it could be Bipolar. You do have some of the classic symptoms. If you are diagnosed with Bipolar, you will need to take a mood stabilizer. Therapy would also be helpful to provide support and keep track of your symptoms. You can find a therapist by searching on line at http://www.bacp.co.uk/ or http://www.cpdirectory.com/cgi-bin/index.pl.
Here is an excellent guide to help you understand Bipolar and understand the treatment-
I am curious why you cannot see the same doctor your friends are seeing. Is it a matter of funds or something else? What happened when your GP referred you to see a psychiatrist? Where you able to follow through and if not, what happened?
How about trying your local ER? It may be an option if nothing else will work.
That is a problem. My understanding is that mental health services, if they are funded by the government, are not permitted to refuse you treatment.
You may want to try a new doctor. Also, you could try searching for a therapist with the links I provided you. Getting a therapist to work with you will help you link to a psychiatrist who can give you the medication you need.
If all else fails, try appealing to this agency: http://www.mind.org.uk/help/information_and_advice. They may be able to help you find a way to get the treatment you need.
I hope this has helped,