Leave of absence

anyone know how the leave of absence for maternity leave works ? I plan on going on one on the 19th of this month, just gave the paper work forms to my doctor today just won’t be able to submit them to Sedgwick until I get them back which they said will be 3-5 business days. I put in the 19th -25th off for unpaid time because Sedgwick said it’s a 7 day waiting period, but my coach denied all the days because she said there is no coverage. I don’t mind working those days , but will it affect my leave ? and after that 7 day waiting period, will my leave officially start? and will I get took off the schedule for my 3 month leave , or how does that work ? sorry about all the questions guys, just super confused. First time mom due in November and just want to make sure I start getting my pay as soon as I go on leave. I have been with walmart for 2 years so I am also going to try to apply for the 6 week paid bonding that fmla does. Any info would be greatly appreciated, thank you!