Yes, I have suffered 24-7 dizziness for 2 years now.
The only thing that helps ease this symptom is benzos, even though I hate taking them.
I need them to get by whenever I go out (That's how bad my symptoms are).
The benzos usually help ease my dizziness at least 60%, but this only lasts until the benzo wears off.
I used to suffer 24-7 depersonalisation, but that isn't so constant anymore, though it does hit me hard at random times, especially when I am away from home.
I suffer breathlessness too, where my breath is extremely shallow, and I feel like I am suffocating- recently this has become a daily problem.
You are not alone, I find it extremely difficult to believe this is all anxiety, but I have been through so many tests, and suffered for so long ( as I am sure you have too), so it is highly unlikely it is anything serious, and most likely stress and anxiety.
Hang in there, I pray things will get better soon for you.