QUESTION FOR ANYONE WITH AN IMPLANON

So I got my implanon in early April and my doctor told me it was possible my periods would go away but they did not. I waited till the second week of July to have sex and had my last period in late June, I have not had a period since then. Has anyone else expierenced this problem? Should I be concerned? I made an appointment to see my doctor next week but if anyone has any information please let me know. I have tried google for answers but have come up empty handed.