I've had a couple of good speed wobbles in my life... absolutely terrifying when they occur. First time was at 80 km on a mountain descent; thankfully the roads were still closed to vehicles so I managed to get it under control after a couple of KMs. Second one was at about 60km on a descent and I managed to hit the handle bar when moving up from the drops. Was able to remember everything I'd read after the first one and had a lot less drama.

For those that have never experiences the thrill https://cyclingtips.com/2020/07/bicy...-to-stop-them/ gives a good description of what's happening and how to try to get it all back (interesting note...ANYTHING with a single connection the the steering wheels can have the same thing happen; Jeep Wranglers were notorious for it)

PS: Glad OP seems to be relatively OK from the experience; not sure I would be as cool about it as s/he