I recently got the implanon on the 21/9/16 my last period was the 6/9/16 to 16/9/16 I had unprotected sex multiple times between the 23/9/16 and the 29/9/16 (my husband came in me) my period was due 10 days ago and all I've had is a little pink/brown spotting but it has been longer than two days so I don't know if it could be implantation bleeding or just a side effect of the implanon. I've been getting waves of nausea but no vomiting, really bad headaches at the end of the day and my mouth is riddled in ulcers! I'm no more stressed than usual so I don't think that's what's causing the delay.