Is Further Medical Treatment Required For Itchy Ears And Diminished Hearing?

I have been having severe itching on my outer ear and inner ear. I have a clear liquid coming out of my ear after I itch. When it heels a dry scalp occurs. All of this occurred after I went to the beach and pool the same day a year ago. My Ent says there is no hole for drainage or abnormality in my inner canal. My hearing has diminished a little on one ear. Do I need to do a hearin test? I also have a chronic sinus infections. Nothing works but Mucinex. I also even has a polyp come out. Do I need to be in medications for the rest of my life? And do I need to have a allergy test? Iam trying to find a afffordable and efficient treatment for both as I cannot afford the unnecessary treatment on a students budget.