Implant removal

Sorry new here so not sure if I'm posting correctly.

Had a NEXPLANON implant put in after my son was born and had it in for roughly a year. Had no bleeding while it was in but had it removed 2.5 months ago due to side effects and have yet to have a period after removal. wondering how long it should take for my period to return? Have had unprotected sex twice since removal but a negative pregnancy test, dont know when period is due obviously so perhaps testing to early? although I'm not actually TTC.

Am also still breastfeeding my 15 month old, could this be why I've yet to get my period idk?