It is quite common to experience bleeding or spotting for two to four weeks after a medical abortion, even after starting birth control pills. Your body is still clearing tissue and adjusting to hormonal changes. You should continue taking your birth control pills as scheduled to ensure they remain effective and help regulate your cycle. Please schedule a follow-up appointment with your doctor to confirm the abortion is complete. If you experience very heavy bleeding (soaking two pads per hour for two consecutive hours), severe pain, fever, or foul-smelling discharge, seek medical attention immediately. Otherwise, this gradual bleeding is a normal part of your recovery.