Past couple of days when i get up from sitting i feel pressure in my head and ears. its not lightheadedness. i know that feeling. i have inner ear issues such as a vestibular disorder and i have migraines?

Headaches, especially migraine, have varying presentations and symptomatology expressions, and even may feel like tension headaches at times. Not uncommon to have a "pressure" sensation. Would check your blood pressure and pulse, to exclude such entities as POTS, and not a bad idea to do some blood tests to check for thyroid, blood sugar, and anemia issues. Your regular doctor can assist.