oh yah. I went through that as a kid, and my 2 year old now. Our pediatrician thought he had pink eye and double ear infection but then a week later she suspected allergies.
I know for us we got rid of fabric softeners, perfume soaps etc... on the food side of things we got rid of mucus producing foods (dairy, wheat, soy, banana and meat), while his sinuses were draining. Also, if giving any bottles, make sure they are propped up good- the fluid trades all around (don't feed/drink laying down). When I was a kid we did garlic capsule oil in the ear. Garlic is an anti fungal, anti bacterial and really good for the immune system. When I was a little older and had ear infections from dairy allergy my mom would make me lay on the couch and let the oil drain into my ear (make sure sterile), but for my toddler I just squirt a little on the ear opening (not down in ear canal, just on fleshy part) and it seems to really help- once in morning, once at night. Make sure that baby stays very warm, socks&slippers, coat hat etc. And can use nice warm bath couple times a day to break up mucus (but make sure to keep baby warm- no drafts, no water in ear). Our chiropractor also suggested eating green veggies and yellow/orange veggies (sweet potato, squash). I also am a strong believer in focused love/snuggling... that body contact and healing touch send so much love and help the health a lot! I know that eliminating mucus producing foods might seem radical- but rice, healthy veggie soups, tacos, stir fry, hearty snacks do wonders! even if it's just temporary for 2 weeks to get rid of ear mucus/pain.
Here is my recipe for squash pancakes- a complete protein- veggie, eggs (mucus producing and some kids allergic- kids with vaccine allergies usually because vaccine uses egg embryo), rice and bean flour. Sometimes I also add old Bananas with squash.
squash pancakes
blend
1 baked and cleaned squash (about 1 cup)
3 eggs
3/4 cup rice milk
1 Tbsp Oil
add dry
1 1/4 cup brown rice flour, 1/2 cup corn flour, 3/4 cup garbanzo bean flour, salt, 1tsp bking soada, 1tsp bking pwdr, 1 tsp cinn.
good luck.