How long do I have to wait to try again to apply for Caregiver support?

you should have received the appeal process in your denial letter. Contact the individual who assisted with your disability application, a Veterans Service Officer, or a Veterans Advocate at your V.A. Medical Center.

..."Signs and symptoms
Ménière's is characterized by recurrent episodes of vertigo, fluctuating hearing loss, and tinnitus; episodes may be preceded by a headache and a feeling of fullness in the ears.[4] People may also experience additional symptoms related to irregular reactions of the autonomic nervous system. These symptoms are not symptoms of Ménière's disease per se, but rather are side effects resulting from failure of the organ of hearing and balance, and include nausea, vomiting, and sweating, which are typically symptoms of vertigo, and not of Ménière's.[1] This includes a sensation of being pushed sharply to the floor from behind.[5] Sudden falls without loss of consciousness (drop attacks) may be experienced by some people.[1]"...

How much care do you require for your condition?

https://www.caregiver.va.gov/pdfs/MIssionAct/CSP_Eligibility_Criteria_Factsheet_092720_Approved_Final.pdf
https://www.caregiver.va.gov/support/PCAFC_Appeals.asp#:~:text=Who%20can%20help%20me%20file,8%20a.m.%2D10%20p.m.%20ET