I have some questions for you, if you don't mind. Your story brings them to mind for me.

1) how old are you?

2) how long have you worked 15 hr days?

3) Do you have allergies/sinus issues?

4) are you exposed to chemicals in your job? Fumes from machines?

5) What kind of foods do you eat?

6) do you have a history of sports participation? Contact sports.

7) do you drink alcohol often?

8) do you catch viruses/colds often (since you have small children)?

9) do you take any prescription drugs for other reasons? Like for blood pressure or cholesterol, or allergies?

So far it is unclear to me if your vertigo started exactly the same time as
the pains you describe. Patients with real vertigo (which is often a sign of
Meniere's disease) can typically lie on the opposite ear (the one not affected) and the dizziness will lessen. I am surprised you were not given Meclizine at the ER. The Valium suggests they thought you had "anxiety". Valium can be used but typically only when anxiety is suspected with the dizziness.

Some virus infections begin with lightheadedness. True vertigo is extremely severe and not really described as lightheaded.

Did you see an Ear/Nose/Throat specialist? ENT? Did you have fluid behind the ear drum? Did you have an electro- nystigmogram?
Did you have autoimmune blood tests? the various Ig measurements?
C-reactive protein, or homocysteine? B12?

Extremely low B12 levels can
cause confusing neuro symptoms that defy diagnosis. You should have B12 run ASAP.

Peripheral neuropathies often have numbness and tingling present as well.
You don't mention that. And those two symptoms can creep up before more
dramatic ones show.

I'd also consider a neuromuscular doctor. With muscle wasting? Do you have weakness? Can you still work?

These are some of the areas your post does not clarify.. So I agree with Glenn, get copies of your tests.