Vyvanse and Depression: Anyone Else Experience This?

been on Vyvanse for... a year now? maybe more? between 1-3 years i go off and on of taking it because i forget or because it was too expensive to fill or because i forgot to fill or what have you but ive gone through this cycle a couple times now where if i take it several days, I get pretty depressed. I totally don't notice the connection in the moment, but it usually gets to a point where i forget a dose or i think of it and just go Meh and ignore it and by the end of that day I'll feel a lot better and then i realize that i didn't take meds. does anyone have this? I'm really considering just stopping taking it.