24 years old, had period (and uti) March 29th-April 1st. 1 pad a day, dark brown blood. 1st time ever having a light period. Breast tenderness, mood swings, nausea and severe heartburn beginning around April 24th/25th. April 29th light grey/pink/dark brown colors and loose stools. 2nd day of period abnormally heavy. Early miscarriage?