Hi,
Welcome to ehealthforum,
Sometimes, you can have spotting continuing for few days after finishing with periods as uterus tries to empty itself completely expelling the pending blood and endometrial tissues. If the spotting is persistent, you should consider visiting your doctor/gynecologist at the earliest for further evaluation and assistance. Look out for development of any other new symptoms and observe your periods/menstrual cycles for next 2-3 cycles and report to your doctor/gynecologist for further evaluation if you find that periods are abnormal.
Take care.