Recently i experience these sudden waves that feel like something between dread and nausea but I feel it right through my body - it starts in my head and then spreads in a wave through my body and down my limbs then dissipates.
It’s really hard to explain the feeling, it’s really quite horrible as it’s more than just a physical sensation, it a feeling of sudden doom. But then it’s gone in a few seconds
I’ve heard of menopause related “electric shocks” - is what they feel like?