Really odd period cycle.?

It sounds as if you had a "brown period". It's quite normal and occurs when your lady bits get rid of old blood after a period. Your cycle changed and it was more than likely due to a hormonal imbalance because you recently started over on the pill. It is nothing to be alarmed about, however, to ease your mind or if you want a more detailed answer from a professional try a health blog like the one on mayoclinic.com or see a doctor.