I had my first depo-provera shot november 25, i had my period from december 29 to february 23. when will i get my next period and how soon could i conceive?

Unpredictable: It is very common to have unusual bleeding patterns for the first 6 months or sometimes more on depo. Did you get another shot? You would have been due for your second shot at the end of february. If you keep getting it, you will probably stop having periods while you are on it. If you don't get it again, you will start having your period like normal, but it may take time to get back to nl.