I've finished a 7 day course of antibiotics for an ear infection, but my ear still feels blocked and sound is still distorted! what to do next?

Follow up: This may be persistent fluid that will take several more weeks to resolve or perhaps the infection requires additional treatment. Blowing up your cheeks with your mouth closed and swallowing may help the tubes leading from your middle ear, or behind your eardrum, to the back of your throat to drain. Also warm compresses along the jaw line may also help. All the best getting this resolved.

Give it time: To have a middle ear infection you must actually trap mucous inside the ear chamber. That mucous can persist and interfere with hearing for a week or so after all the germs are killed off. Once the mucous drains through the Eustachian tube, air returns and hearing improves. If you still can't hear better in another week I'd have it re-checked,