Postpartum anxiety

I’m currently 7 days postpartum. Me and my husband both have full time jobs and we both were approved for 6 weeks of paid leave. I work from home where he has a fairly labor intensive job where he’s away for 10-12 hours a day. It’s rare he gets home after 8 hours.

Even though we still have 5 weeks remaining (which isn’t a lot in the grand scheme of things) I’m having a lot of anxiety over the fact that I will be here by myself with our newborn and 18 month old while also trying to work. Is it possible? Has any one else been in a similar situation? How did you manage? I’m making myself sick thinking about it, as my toddler doesn’t fully understand yet that baby sister is not a doll. I’m relying so much on my husband to care for her while I breast feed.