Lack of ambition? What do I do?

Hey lovely gals! Lately past couple years I’ve been going through a stage of “laziness” and very unmotivated. I want to have things in my life done and accomplished but there seems to be a mental block. I’m 20 and live with my parents and have little to no bills, I work 3 days a week because I’m tired easily and I don’t drive. It seems that all I want to do is be at home and sleep. Compared to my peers I’m very behind and lacking but I can’t seem to pull my head up and go for the things I NEED done. Tell me ladies, have you gone through a period of no ambition and how did you pull yourself through?