I agree see your doctor asap. I wouldnt rule it as anxiety until you know that there was no medical cause for it to happen. Keep us updated!
I would see your doctor ASAP, because this could be several things. You need to rule out all other causes before even assuming it's anxiety related. Anxiety presents with a multitude of symptoms, but you just need to make sure it's not something else first. If everything checks out okay, then talk to a psychiatrist and go from there. I wish you well, I know this had to scare the heck out of you! Take care.