That sounds just like the symptoms of something I had a few years back. Uhm...what was it called again? Oh yeah, the flu! 😄 Anyway, I hope you fell better now because whatever it's called, being ill is never fun. On the other hand, you may have needed it... In my case, I've only dealt with flu, or stomach bugs a couple of times in my life (the flu 3 times, the stomach bug a few more), and it was always at a moment where I felt like a soggy mop already. I actually knew I'd need to get all the crap out of my body every time. And every time, I'd get sick, drink lots of water, throw everything out again, and felt cleansed a few days after the wobbly leg syndrome was over. So I hope this is the case for you too.
And yes, these vax's seem completely pointless and definitely not appealing. In Israel they're already talking about a 2nd booster (4th shot in total). That's really taking it one step or two steps too far I think...
Saludos from Mexico!!!