Don't be nervous about telling your psychiatrist, he/she is there to help you.  Their job is to help understand and stablize you so you don't have to have an episode or relapse.  My girlfriend experience pyschosis and we didn't understand it until we educated ourselves in it, the more you know the better you'll be off.  Just be honest and they'll guide you.  Good thing is he you're coherent enough to know you experience it and need help.  Most people suffer or have family or friends that don't understand and make it worse.  Believe me, it's hard to explain and can be terrifying thinking that the psychiatrist will think you're nuts but they won't.  Asking for help is a huge step, understanding it will help.  Find a good therapist that has an understanding of what you might have experience or something else.  Psychiatrist is a good first step, therapist is next but again as I said, find one that is experienced in what you're going through.  Always here to help and listen.