Implanon

i got the implanon about 2 weeks ago, and the doctor did say that my period was going to stop, but <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> keeps saying that i'm 7 days late??? and i did put it in my health profile. how do i tell her that i'm not going to get my period anymore?