Thanks for writing to us with your health concern.
You need to be evaluated for premenstrual spotting.
It could be remnants of the hormonal effects of the pill, however, evaluation should be done.
PLease get an internal exam, a pelvic ultrasound
scan and hormones - FSH, LH, TSH, Prolactin, OGTT, Free testosterone
It would rule out conditions like fibroid, endometrial hyperplasia
, PCOD , endometriosis