Pink discharge after AF

AF ended 3 days ago....maybe Tmi but it ended with Brown spotting than cleared up and I had pink discharge 2&3 days (so far) after the Brown cleared up. It was a shorter light period. I took an hpt about 2 weeks before AF... I didn't have sex during my last fertile window so if it came back positive I would have been about 7weeks... it was negative. Anyways I'm spotting pink, i have a bad headache, upset stomach and very congested. Can anyone help me as to what the pink discharge is from?