I am female, 18 years old, 60kg and 5ft6in. I began my period 2 weeks ago today. it lasted around 4-5days. 2 days ago i started getting thick light brown/pink discharge which has only just died down. No itching or burning. I am on the pill and have been told spotting can happen due to the pill but this has never happened before. Please could you tell me what it might be?