High anxiety about work

So I went back to work today after maternity leave. I started a completely different job so felt so down about it. I cried this morning because I had to leave my girls. I know I’m doing this for them but honestly it’s so hard. I hate being away from them, my youngest is 8 months but I’ve just had the worst anxiety about leaving her, my eldest is in school so she’s totally occupied. Is it normal to feel like this