Lightheaded and shakiness. Longer!

I’ve been having episodes where my legs feel weak and sort of floaty, like they don’t have proper support. When I stand or walk, I feel unsteady and have to clench my legs or curl my toes to feel grounded so I don’t lose balance. While walking, I can’t seem to walk in a straight line. I feel slightly tilted or shaky, like my body is off-balance, even though the ground isn’t moving. It feels similar to how you feel right before fainting, but I don’t actually faint. During these episodes, I also feel foggy and numb-like, and concentrating becomes difficult. Taking vitamin tablets seems to give some temporary relief, but the sensation doesn’t completely go away. I feel lightheaded and unsteady, with a floaty weakness in my legs. I can’t walk straight and feel slightly tilted or shaky, like I might faint but don’t. I also get brain fog, and vitamins help only temporariy. And can't stand in one Position longer