Hi, I would say that you are unlikely to be pregnant if you did not have any sexual intercourse in the past two weeks since you have mentioned that you had your cycle a week before. Light pink discharge can occur when blood is mixed with cervical fluid secretions. Any history of smelly or excess vaginal discharge should be noted to rule out vaginal infections. Vaginal infections can also cause brownish discharge and antibiotics may be required. Fluconazole is an anti-fungal drug which can be given orally as a single dose. Anemia, hypothyroidism, crash dieting and vigorous exercise can also contribute to delayed or absent periods. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Saranya Ramadoss, General & Family Physician