Working in daycare while pregnant?

I am currently 22 weeks pregnant today. I’ve been working in this daycare sense I was about 10 weeks or so. I go to the doctor in 2 weeks so i will be asking my doctor, but i wanted some advice here! What do y’all think with working with kids all day while pregnant? I am in the toddler room which are 2 year olds. I’m in there alone so I change like 7 kids diapers alone all day. Care for them. And even tho lifting isn’t good, it’s hard not to do in there. Do y’all think it’s harmful? I come home almost in tears because i am exhausted and over whelmed. I work 9 hour days. I feel like it stresses my body out but I really need to work. Can someone please give me advice. I just want my baby to grow safe!