Morning. ive had regular periods all along and now its the second month my periods are not regular. i just spot and thats it. im on the chip on the arm contraceptive. what could be causing this sudden irregularity?

BC and spotting: i assume you are on the Nexplanon birth control rod . As seen below about 30% of people with Nexplanon implant will stop getting a period within a year so likely you fall into that group. Just to be safe check HCG but this method of birth control is 99% effective. https://www.plannedparenthood.org/learn/birth-control/birth-control-implant-implanon/what-are-the-disadvantages-of-birth-cont