So sad and stressed

Brittany • Mommy to a wonderful 12yr old boy, 9yr old boy 7yr old girl 6yr old girl and 3yr old girl. Due March 11th 2023 with a boy.
I'm 31wks pregnant and have an 11mth old daughter and I have to let her go to her Dads for an over night. I've always put her to bed and woke up to her smiling face. Her Dads never put her to bed. My son was 2.5yrs old
B4 I spent a night away from him. My hearts breaking over this. I know she needs time with him, but I'm just not ready for over nights. The longest I've even been away from her was 4hrs and that was just the other Day when she went with her Dad. I don't know how other parents do it.