I'm absolutely not suggesting it is the same with you, but I can get VERY weird things with my silent migraine attacks. With time I have learned what are migraines and not because for me, the migraines for me come with a sort of mild nausea.

Things I experience with migraines (and I have painless attacks): Balance is getting worse, some slurring, nausea, different kinds of visual distortions (my most common is a very bright light shining at me), hands growing and shrinking, world is not even but tilts to one side.... and probably some more stuff.