Babysitting..

Lisa • 36 years old, first time mom after 7 years ttc, baby boy Colton born Aug. 23rd 👶. Lost 2nd baby at 7 weeks.
I am going back to work in less than 2 weeks and my baby isn't on an exact feeding and sleeping schedule. He eats every few hours and is awake a few times overnight around midnight and between 3 or 4 and again from 6 to 8. 
I change his diaper before each feeding and during the day I'll change it every few hours. He definitely likes a clean diaper. 
When I go back to work, my boyfriend and his sister will be my baby's caregiver. So I made a comment to my boyfriend that I would like baby to not sleep all day and have regular diaper changes or I'll have to find a different sitter and he got all mad at me. I just don't want my baby to be snuggled all day in a wet diaper, get diaper rash and/or not sleep at night. 
Anyone else have concerns about going back to work and having someone else take care of your baby? In a perfect world I'd stay home or have my mom be my caregiver. But that's not a feasible option right now.