Boric acid really helped me with my earache! I heated up 4 oz distilled water (boil tap water to sterilize if you don't have distilled), and added 1 TBSP of Boric acid as well as 1 TBSP of vinegar (I used organic ACV but white vinegar would work too). I mixed until the boric acid crystals dissolved and let it cool. Then, using a clean eyedropper, I put 2-3 drops in the affected ear, 2 times daily. Laid my head down on its side and let it sit in there for 10-15 minutes before putting in a cotton ball and sitting back to give it time to work. The first dose took away the worst of the pain. Today I woke up with no ear pain, at all! But I'm going to keep using until the pressure goes away.
I also made a solution for my eyes, since they always ache when I get a sinus/ear infection. The recipe for that is 1/8 tsp to 8 oz distilled or sterilized water. I only keep these solutions for a day or two and then throw them out. Best to make a fresh batch when you need them!