Depo Injection

Has anyone else had delayed period after coming off the Depo Injection. I started it when i was 18 and had to be taken off because i had out 4 stone on over a short period of time i am now only 23 and last week had my first period in over 18 months i was starting to get worried incase this was caused by fertility issues. Has anyone else had delayed menstruation because of Depo?