I'm assuming it has to do with the letdown, as it happens a few seconds in to a feed. First I get really dizzy -- like the room is spinning and I have to shut my eyes. That only last a few seconds, then ow, ow, ow! My boob starts to hurt and goes all tingly. Not the one DD is feeding from, the other one. That lasts maybe a minute or two, then everything's fine.
Does this happen to anyone else? Any other weird letdown sensations?