Periods after contraceptive nexaplon implant?

[pumpkinsweetie]

Hi there i had my arm implant removed and went straight onto the contraceptive pill.
When can i expect my periods to return? (didn't have any on implant).
I am on day 6 of my 7 day pill-free break and i haven't yet started my period-is this normal or should i be concerned?
When i used to be on the pill i started my period on day 3-4 of my pill-free break so im a bit worried as to why i haven't started?