Isn't this the hardest thing? My daughter suffered through a 6 month long ear infection. A couple of months before she got her tubes, I was in the office less than two weeks one month--she was either sick from the ear infection or suffering from antibiotic side effects.
You should definitely get a referral to an ENT--you probably don't even need a referral if you have a PPO or OAP.
The good news is she has rarely been sick in the last year since the surgery. I have combatted some of the colds/infections with a course of Mucinex at the first signs of congestion. It has worked great to thin her mucous and keep it from progressing to a sinus or ear infection. Talk to your pedi about dosing.
I also added Floradix children's vitamins and a children's immune support supplement to her daily routine and I think it has made a difference. I seem to notice her catching something when I miss some days due to business travel. Check Whole Foods or even HEB.
Have an open discussion with your employers about what is happening. Keep in mind, also, that you may be covered under FMLA depending on the size of your company and tenure. Taking unpaid days is hard, but it can help you hang onto your job and take some pressure off your employer--they lose out too when you have to miss.
Good luck...this too shall pass.