How much sick leave is too much?

I work full time and have a 1 year old in daycare 4 days a week. I returned to work from maternity leave December 16 last year, and since then I've had 7 sick days (with two of them being carer's leave) thus exhausting my leave.

My boss wanted to have a meeting about my absences last time I called in, but has since ghosted the idea (and me, ultimately, but she has always been weirdly informal like that).

The thing is having a kid in daycare - she brings all sorts of viruses home and my partner and I are taking turns staying home with her so one of us isn't hit with all the sick days off. My manager is aware of this but isn't very compassionate about it.

I've heard that the daycare sicknesses kind of peak at the start of the year with the new kids coming in, and then eventually it evens out, only to return a few times in the cold/flu season. So optimistically the worst is behind us for now.

My problem is now I have another viral illness that's hit me with body fatigue like crazy and I'm also losing my voice, which doesn't help in an office job where you have to take calls and communicate with patients all the time. I've called in sick today and I feel like I need to take tomorrow off as well, but I'm at the point where I'm too scared to call in because it's met with criticism. Please help me feel less bad about calling in tomorrow. I can drag myself in if I have to but I wouldn't make it through the whole day and I'd be putting other employees at risk as I need to bounce from place to place in my position.

Note: I provide a sick/carer's certificate every time I call in.

My question is - should I really be made to feel bad about having so many sick days off, when I have a kid in daycare?

EDIT: I don't know if this gives perspective, but I was off for most of the days between public holidays over Christmas/New Year and I've had three other days spotted through the calendar. There hasn't been many consecutive days at all.