I have this exact same problem, it’s been going for about 8 months now. I also was exercising a lot when it came on. Heavy head, feels like I’m walking on a tight trampoline.
Going to talk o my doctor about it soon.
I'm glad I'm not alone it's been happening to me too. Sweating a lot more than normal. Feeling like my movement is a bit jerky, legs feel weird when walking idk how o exactly explain it, kinda feels tweaks tbh.
Still haven't solved this out.
Please, I am scheldued to for a neurologist in few days, but I'd like to know as much as possible on the topic.