Back to work?

Melissa • Married to the love of my life! Had my sweet Madison on 07/31/15 and now due with baby #2 Oct' 16.
Any August mommys back to work already or will be going back soon? I start Monday, and my baby girl will be 8 weeks on Friday. I'm mentally preparing myself but it's so hard. I don't want to leave her. The only upside to it is that it's part time and my sister is keeping my sweet Madison. I just keep thinking I'm going to have a break down while she's not with me, and how no one knows her like I do.(not even my husband) I know exactly what she wants when she has a certain whine or grunt. Am I crazy?