I had ipill 5 days before my due ovulation date last month.  After one week of when i had the pill. I started having irregular dark brown coloured discharge/spotting for a week. I did urine pregnancy test one week before next expected period date and it was negative. For next 2-3 days i had bright red coloured bleeding and period like pain but in lesser intensity and lesser flow. Is this implantation bleeding or my period? If it is a pill effect when will i get my next periods?