Why would i be spotting light pink a week after my menstrual cycle has ended? also have slight cramping and bloating

Hormones: The most common reasons for spotting is going to be an imbalance of hormones. Estrogen and progesterone control your cycle and when not in correct balance to each other, can cause lining to shed when it's not your period. Other causes are weight (thin/heavy) and thyroid. See your doctor if persists. Birth control can help to control you cycle. Best of luck !