I need help not feeling so guilty 😭

Okay so I work in childcare I work for minimal money but mom really needs me I found out I'm pregnant and the baby is actually growing and I'm not just going to miscarry like I usually do. The thing is the kids are not easy they are sometimes but they need to be held constantly which is hard cause they're like 65 lbs collectively on my stomach while I'm already extremely sick they don't listen the best and these 12 hour days are really starting to get to me. Starting in the winter it'll be 14 hour days and honestly I just need help figuring out how to tell mom I just can't do it anymore it's a miracle that I'm even still pregnant and I'm probably never getting this chance again. 😭 but I feel so bad cause I don't wanna upset anybody please help me 😭😭