maternity leave ?

for those of you who are working moms ( more so essential workers ) when are you planning to go on leave ? i don’t necessarily get “ maternity leave “ it’s going under as disability unfortunately but that’s beside the point .. my friend who works in the same company same position said she went at 36 weeks but suggested i even go at 35 but not past 36 ? my job is physical labor high volume and i originally worked 45-50 hours right now i’m averaging 37-40 from hour cuts on my store . i’ll be shortening my days because my backs been giving me hell but i don’t want to leave to early but also crave the time to just enjoy my current two before third one arrives lol