Working is so hard

I am almost 35 weeks and just exhausted and hurting. I am a clinical laboratory scientist so I spend a lot of time on my feet but not the entire day. I don’t know how you ladies do it that are working in factories and such where you’re working on your feet all day. I’m fighting that battle of wanting to take my leave early, but knowing that means less time I get with my baby. Plus I only have about 6 weeks paid (and then 6 weeks unpaid) from the time I leave work. I am so ready to be home with my baby girl, instead of being giant and in pain at work.