Need advice on pituitary tumor diagnosis

hi all, new here :) I'm wondering how you went about pituitary tumor diagnosis? I was diagnosed with hypercortisolism and hyperprolactinemia 7 years ago, but my mother could not afford the brain scan to check for a tumor. I am now suffering from the symptoms and having visual disturbances and eye pain. I have a hunch it is a tumor and has been all along, but I'm having trouble finding a doctor that takes it seriously. its coming off as self diagnosis but I'm actually very concerned for my vision. Any advice and tips would be appreciated. I look forward to following all of your journeys!