I had my first baby July 13th via C-section. My partner and I resumed having sex (I know, not smart) at 15 days pp. My bleeding had stopped on the 27th of July and I took a Plan B on the 28th of July. I started having PMS like symptoms and started bleeding bright red blood with small periodic clotting on August 4th. The bleeding lasted 4 days and was identical to what my periods were like before pregnancy. Could this be a period triggered by the Plan B?