Omega-3 Improves Your Pet Health

My cat is a 5 yr old female. She has many problematic symptoms and I have taken her to different vets numerous times, without any relief. I’ve been told she had an ear infection, a yeast infection, ear mites, leukemia (which was ruled out), intestinal problems, and digestive problems. Each time I treated her with what was prescribed.
She still has many symptoms such as:
watery eyes
dark spots in her ears
gooey substance in ears
appears to be what looks like scabs on her chin
sleeping more than usual
not as friendly; irritable; sad
vomiting
hair loss
rubbing sides of her face against things
have found stool other than inside litter box (unusual for her)
If any one can please help me in finding possible diagnoses, treatments, causes, information, products, etc…
She is my best buddy, I love her, and I hate to see her like this because it is my responsibility to take good care of her.
Thank you