I've been getting that to. Although, over the years i've had it quite often. My mother has had it for most of her life too, along with pain. It turns out it was her sinuses (she thought the worst. This was back in her 20s and she wasn't a hypo like me) but it's like, you're not dizzy, but your head feels so light and spacy for a minute. Then passes.
Happens to me often. Anxiety can't help, but i chalk mine down to allergies/sinuses. Anxiety just worsens things.