questionssss ?

so i want ttc , but i been on depo for 4yrs now and recently got off a month ago , im on what i think is my period after having sex with my partner a few times within 5days and then now im bleeding ? is it my period coming back or just side affects from being off a month? and its my first time having sex since i been off the birth control ! he did say a few times he came inside me so i want to know whats going on ?