How long have you been ttc? If it has been a year or so, you could go see a fertility specialist and they will help you get your cycle back on track. Some women take a long time after depo to regulate, others it happens right away. Fo me, it took me 6 years to conceive. However, I didn't start seeing the specialist until about 9 months before I conceived. I wish I had gone to him earlier! Good luck!
all you can do is wait is out if you havent been it for long then you may have better success. i was on for 4yrs it took 7 months for my period to even come bk and 5yrs later im still no prego but every1 is different my sil got prego after 1yr of being off it.