If you passed out on the floor, did you call your Dr. and let him know this? It needs to be addressed. There has to be a reason you did that? You might want to call your Dr. today and talk to him about it.

The MRI won't hurt to have I don't think. It's not invasive unless they have to give you some kind of meds to make things show up better inside. As far as the triggerpoint, they usually are just shots of Mericaine or lidocaine, Ketatime or something else and it's usually just for the area that the pain is in to calm that area and the referred pain. They do work great though.

I think you still should call your Dr. though and let him know about the fainting so they can maybe find out why you did it.

Take care,
Ada