Concerns about Injectable contraceptives

Hi mommies, Good evening. Gusto ko lang po sana magtanong kung may nakaexperience po sainyo na magkaperiod more than a week, first time to used family planning po kasi tapos injectable na good for 3mos. Hanggang ngayon po kasi may spottings pa ko, normal pa po ba to o need na magpunta sa health clinic?