How, and what should i say to my doctor to get a referral to the psychiatrist?

That's easy: Doctors refer to psychiatrists all the time. Don't be embarrassed. Explain that you think you need to see someone with more expertise than a family doctor. I've yet to meet a primary care doctor who takes offense at a request for a psychiatric referral. So muster up your courage and go ask. Good luck.

Speak up!: The most important thing is to just say it. You can start by describing your concerns/worries briefly and how/that they are distressing you or causing problems/suffering for you. Speak up whether or not your doc has tried to help you. She/he will be ready to refer you, and will be impressed with your candor. So speak up!

Simply ask: Share with your doctor what's happening inside that has you concerned about yourself -- and why you want to see a psychiatrist. Your doctor cares about all of you, not just your physical self. S/he knows that some problems require more time and specialized listening than might be available in a primary care practice. S/he will want you to have whatever help you need to feel better.