8 months of blocked ear and head pain

for 8 months i’ve been dealing with the feeling of a blocked right ear which is causing pain in my right temple and eye and sometimes radiates to my shoulder. i’ve seen a doctor countless of times in which nothings been able to help, antibiotics, spray, another doctor said to just chew gum for two weeks. also did nothing. they say inside looks normal but if i stick fingers in both my ears i can feel a significant difference in size of ear canal. my ear will not unpop. and the past few weeks it’s been getting worse and worse and making me feel disgusting and like something is seriously wrong with me. does anyone have any advice or any guidance as to what this could be