Hello, If you have missed any pills earlier in the pack or didn’t take them correctly, there could be a slight chance of reduced effectiveness, so be aware of that. It is breakthrough bleeding, which can sometimes happen while using birth control pills, if there’s a slight disruption in the pill cycle. You should finish the remaining two pills in the current pack. This helps ensure that you continue getting the correct dose of hormones and that your contraceptive protection/effectiveness is maintained. Start the new pack thereafter, after you have finished the placebo pills of the current pack. If breakthrough bleeding continues, or if you re unsure about whether this bleeding is normal, get clinically examined by a gynecologist. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K, General & Family Physician