i had the same thing happen to me years ago with i got off the shot. because of the hormones in the shot it can make your body's chemistry all off wack. i would go and get all your blood levels checked, and see what they have to say. with mine, it was that my progesteran was higher and estrogen was lower and my blood sugars were all off wack. so i had to change my diet and soon enough they were all back to normal and i was getting my periods regularly again. i went over a year with all that craziness after getting off the depo, same as my cousin. although our bodys just werent made to take any kind of birthcontrol, (pill, depo, ring, mirena). but i would just suggest going to your regular doctor and having them run a full blood work up on you. i hope this helps. i know how annoying and stressful it is to go through that. best of luck to you.
I would say to take a test. Have you had any pregnancy symptoms ? the easiest way would be to test. if its negative then i would say its probably just stress and your body getting used to not being on the depo. you can also ask your dr they can usually give you somethin to help get your period back regular if your not pregnant. hope this helps.