Going back to work 😩

I go back to work in 2 days after 4 months of maternity leave and I’m freaking out. I’m so sad. I don’t want to leave my children. I’m also a teacher so I’m going to be so exhausted when I get home. They usually sleep until 7-8 and I’m going to have to wake them up at 6:15. It just seems so unfair. I having to work outside the home but the insurance is so good. I would give anything to stay at home with them. Any words of encouragement are appreciated. Thank you