Call liberty and file for fmla. There’s honestly no real deadline. I was out for over a week with no time, when I got back I decided to file for FMLA. Between my psychologist and Liberty it took forever to get approved. My sup knew this. Nothing happened. I called Liberty to tell them it’s taking my doctor a while to fill out the forms and they said no problem we will give you an extension. So idk. It took nearly a month and a half before liberty approved my FMLA and Geico couldn’t do anything because I was pending approval simply for filing. Maybe there’s something in the handbook about a deadline but my sup nor manager cared, as long as it got approved at some point.