1) If you have never seen a psychiatrist, then I recommend getting an appointment with your general practitioner (family doctor) ASAP and tell him of her what's going on. He/she can make a referral if he/she feels it's necessary.

2) If you are currently seeing a psychiatrist, then I would call the office, tell them what's going on, and try to get in ASAP. In any case the people at his/her office will direct you as to what you should do.