Me and my bf had sex 2 days after finishing me regular period ended. Afterwards, noticed I was slightly bleeding. It quit by the next day. (It was bright red) however, 4/5 says later I began to bleed again.. and have been now for two weeks. Its light enough to wear one pad a day. It ranges from bright red to dark brown.. no clots or pain.. but extremely fatigued and not fully feeling my full self.. any ideas as to why?