in your title, you said you are not ovulating? you would need to ovulate in order to become pregnant.
since you havent had a period, i would advise that you get some ovulation test strips to determine if and when you are ovulating and take it from there.
If you ARE ovulating and had unprotected sex, you have a 20% chance of becoming pregnant.
good luck!
Are you using OPK's? Is that how you know you aren't ovulating, you would ovulate before you get your period. Like the other post said, you have to ovulate to get pregnant. Depo can take 12-18 months to get out of your system. Since it has been 7 months without a period, your OB might want to know. After 6 months and no period for me, my doctor gave me provera hormone pill to jump start my period, I got it the next month and then didn't get it after that. They found I had a cyst on my ovary caused by the depo and that's why I wasn't getting my period and ovulating. Sorry this got so long, I guess my point is, see your doctor they probably want to know you are still not getting your period and if you do not want to become pregnant make sure to use another form of protection and if you do want to get pregnant, let your OB know so they can help you get your periods back.