Probably not what would be medically defined as a panic attack but it was by my standards.
I went cold and faint, my tummy dropped to my feet and my brain filled with storm clouds. The worst symptoms eased off gradually but the storm raged all day.
What was worse is that it's the first one I've had for ages, years even. My pills keep my anxiety under control most of the time so I'd almost forgotten what it was like. Even now writing about it - and it happened two days ago - I begin to feel fretful. I can't go back there. I won't go back there.
P.S. Having googled panic attack I see that my attack was fairly typical, which is sort of a relief: it makes me feel less of a fraud.