I Am Worried

I have genetic hearing loss and complications from small eustacian tubes that have caused me to have one ear I can hear out of, and recently I caught a virus from my kids that go to daycare which caused my hearing in my only ear to drop below the normal threshold for hearing. I started oversleeping my alarm due to not hearing it go off (4 different alarms set on my phone which vibrates and flashes too). Aside from being late multiple times this past month my 17 month old seems to have inherited my ear problems. I'm waiting on new hearing aids, and my daughter has had an ear infection almost every month since January of last year, and she can't get into an ENT to discuss tubes until August. Daycare has sent her home and because she has a nasty cold and a fever, naturally I want to take time to care for her rather than send her to daycare and work. I wonder if sitting down with my boss and showing her my disability proof and the recent change in hearing and perhaps a doctors report on my daughters ear troubles will enable them to understand and be accommodating to these health issues. I'm a caregiver at work and a caregiver at home, and I am scared of loosing my job if I take time off work on top of being late over 6 times to work in the morning. I had asked for a change in work schedules to work evenings instead, but my job refused. I feel like I'm obligated to work instead of stay home when my daughter is miserable while antibiotics kick in. My husband doesn't take time off too care for sick kids. It's almost always the "moms duty". That's a crappy feeling like- it's ok if I were to have my job on the line for absences to fulfill family responsibilities. I haven't been there a year so I can't claim FMLA. I worry they won't understand or take serious the hearing loss I've incurred and how it affects me since it dropped. And even if they do get it, I worry they might decide I'm like a liability for tardiness with my alarm issues (looking into a bed shaker sonic alarm) and chronic absences for my daughter who is sick so much that they decide to let me go... I do need to talk to someone in Human Resources maybe? The anxiety... I have people who could provide backup childcare easily like my mother in law, my mom, my aunt, and my sister who is in high school. However, they hold the view I should stay home with my sick child because they don't want to babysit a sick child, and since I'm the mother... I should.
Any advice on how to approach my employer professionally about this all would be greatly appreciated. It's a great cause of stress and anxiety, and I want to not work at all and just do school, but I have to provide since hubs and I are temporarily separated and the kids are with me. It pays too good to give up or be fired from!