Get to the vet NOW.  This is an emergency.

Thank you for the response he is going to be seen tomorrow

Please go see a vet. I know money is sometimes an issue, but try to apply for care credit, or something to get your dog looked at. Is she eating? Is she Drinking? Are her gums nice and pink or white looking? can she walk?

Please call a vet!

The best treatment for ear infections depends on what is causing the infections in the first place.  And the only way to be sure of the root cause is to have the ear swabbed and cultured (your vet will do this).  I say this because the infections can be yeast or one (or more) types of bacteria.  Each of these causes should be treated differently (a vet will use a different antibiotic based on what strain of bacteria is present for example).

Just guessing will lead to a worse infection, or years of fighting infection after infection.

And yes, Laura is right, often the reason the infection got a food hold is due to allergies, and grains impact a dog’s ability to deal with other allergens.  So, go to a good pet store, ask to be shown to the grain-free dog food and then start reading labels.  You want a grain-free food that lists real meat as the first 2 or 3 ingredients, and has NO by-products.  Real meat is easy to recognize, it will say: turkey, lamb, elk, bison, pork, salmon meal, whitefish meal (meal is the entire animal ground up and dried).  Avoid chicken and beef as many dogs are reactive to these sources of proteins.

Once you are on top of the infection (by using the medications your vet prescribes) you want to keep the ears clean and dry – I use a small amount of Boric Acid (found at any pharmacy) on a cotton swab and run it around the inside of the ear once a week.  Be careful to not get it in eyes or lungs.  It helps keep the ears dry, and produces an acid pH which discourages yeast and bacteria.