Is there a parent or a guardian or a caregiver or social service who normally have custody of this child? If they say it’s ok then I guess it’s fine. You said you didn’t want anyone to know how you are feeling, if it wasn’t a big deal you’d find it easy to tell people like if you had a cold
I worry about yours and a little ones well being. If I thought that food from the grocery store is contaminated, alarm clock is recording me and I wanted to let blood, my daughter and son in law would need to know before leaving me alone with my toddler grandson. They’d not be ok not knowing. Please don’t keep these kind of things in secret.