Do you take any supplements?

Did you have hip pain, before eating the pizza?

Did you have an xray of the hip?

People with alcohol consumption histories often have metabolic issues with
Thiamine B1.

I'd get that B12 level and report it here. There is a difference between B12
in the spinal fluid, and the blood serum. Your post doesn't clarify that.

If you are exposed to fumes from machines alot, there can be carbon monoxide there. This can cause diffuse neurological poisoning. If you smoke, you add to it.

For now you can yourself, take some nutrients. You can start with B12 1mg
methyl version, and a quality B-50 and see how you feel.

You may have a degenerating hip. (from your active past). That should be evaluated, since necrosis is a slow process and shows up years after
the sports/other activity. Sometimes many things gang up and happen at once, and it is hard to separate them.

I think you should see an orthopedic specialist for that hip and potential neck symptoms. It takes time and many tests before things get identified.
With your active past history, looking at structural damage should be
done.

When nothing is found with dizziness they often say a virus in the inner ear.
That would not however, cause your hand/arm/leg issues.

The diagnosis of benign positional vertigo is common. There are websites you can search, to show you head positions to do to help realign the little otolithis that are in the semi-circular canals. They can move around and cause dizziness...
you can start here:
http://www.umm.edu/otolaryngology/bppv.html