I have chronic sinusitis (opacified sinuses). I started sinus rinse but have ear pain, shooting pains in my head, and vertigo after rinse. Continue?

No. Occasionally sinus rinses will force bacteria or fungus into other areas including the brain. They are not recommended. Gentle saline spray may help or topical steroids. The sinuses can be difficult to treat and sometimes require drainage. Ask for an ENT opinion.