Depo Shot

I been taking the Depo Shot for about 4 years and haven't had a period but after my last shot in February 2017, I decided to give it a rest for a while. I'm just curious to know if anyone here has done that? If so, what was you experience like? How long did it take for you to get a regular period after stopping the shot? EDIT***Oh I also wanted to add that I have Endometriosis and about a week before I started my period I experienced really bad cramps for about a week with no bleeding at all....I'm wondering if that's normal for people with Endo or possibly related to me stopping the Depo...?? I have been lucky to have never had cramps before and only had one bad episode which was when I was diagnosed with Endo right before I started the Depp 4 yrs ago.