If i didnt receive my depo-provera in may had unprotected sex on june 6 nd15. and then had a lil spotting on the 16th. i there a chance i might have gotten pr?

Yes: Pregnancy is always a possibility if you are having unprotected intercourse.

Yes: If you didn't get your Depo-Provera shot when it was due, you're no longer protected by the depo. Whenever you have unprotected sex, there is a chance of pregnancy. You can do a pregnancy test 2-3 weeks after sex to find out. Some women aren't fertile for a while after stopping depo, but some are.