Feeling dizy and tired. Advice please.

Hi, I feel like a rocking sensation or feel like I am swaying, when I move my legs or hips in a certain way It's been 3-4 months now. Went to a neurologist he gave me B12 supplements and shots to be taken, but my B12 serum levels were normal, it was around 188 first time and 400 next time befor consulting the neurologist. I have taken 6 shots, but don't see any improvements. Recently I don't feel much like swaying, unless I move my leg and hips in a certain way, rather I feel like I will fall, I feel very weak and tired sometimes, I feel like I am not able to see clearly and hear properly sometimes, and my eyes feel tired,  and sometimes I feel very dizzy and I don't know weirdly I feel some kind of awkward sensation in my stomach too, when I feel dizzy, I have had acidity since many months, did endoscopy it was normal, have stopped medicines , but acidity persists a little, and since a few days I feel feverish also slightly and have low back pain alot. advice please.