Help???

So with the complications I’ve had during this pregnancy I have missed quite a few days at work of course I have doctors notes for the days missed but I work in a warehouse and this pregnancy is literally taken everything from me I have no energy my body is weak I can’t eat without wanting to puke 🤢 I’m afraid that is I miss to much time because of this pregnancy I could get fired so I’m thinking maybe I should go on short term disability until I feel safe to work and or it’s time to go on fmla until I get my maternity leave... will my doctor approve this if my body is to weak to work.... now that I’m older I feel like this pregnancy is a lot harder then my past ones.... and I wanna be safe then sorry any advice?