For the past 3 months i've experienced an off balanced/walking on a boat/falling feeling type of dizziness. I don't feel lightheaded, it's more like a body and unsteady type of dizziness. It's like i have no balance. However, I've never fallen.

I'm so confused about what this is. It feels pretty intense at times, like i'm falling backward. I notice it most when sitting straight up, standing or walking slowly. The weird thing is when i do brisk walking outside, the feeling is gone. Also when i lay down i feel fine. I thought it might be an inner ear problem, but how does it make sense that the feeling goes away when i do brisk walking or running?

It's a very odd feeling, feeling like you're going to fall but never actually falling. I did tell my doctor but he wasn't concerned. Could it just be stress and anxiety?