... 3 weeks. I have always had a regular period on these implants, same day of the month for 6days for 6years. until last week, my period was suppose to start and did not, instead i had a dark brown discharge spotting for two days and then nothing. I have abdominal pain and neck pain and was really sick last week with a flu like symptom. My question is , is this a side effect of this expiring soon or possible eptopic pregnancy?