I just saw this thread after the emergency was over, but since a lot of people seem to be reading it, I just want to add that if you're in the US, the main number for the American Association of Poison Control Centers is 1 (800) 222-1222.

That number will route you to the center closest to you. I called in the middle of the night a few months ago because my pharmacy mistakenly put a Parkinson's drug in my pill bottle instead of klonopin and I took 3 at bedtime. I started feeling really sick about an hour later and couldn't reach a psychiatrist or my pharmacy, so I called the poison control center kind of out of desperation.

I was amazed by how knowledgeable the woman I spoke with was. She was some type of "super-nurse" and talked to me for nearly a half hour, explaining how the medication was going to make me feel and how long it would take to get it out of my system and that it shouldn't harm me seriously in any way.

I was able to go to sleep after talking to her. Otherwise, I'm pretty sure I would have been awake all night waiting to see what was going to happen.