I had my period on December 4th, then on December 29th after meeting w…

I had my period on December 4th, then on December 29th after meeting with my husband, I saw blood throughout the day. I didn't see it again until the next day. I noticed it only when I peed lightly and pink with minor pain in my left abdomen. My normal period was supposed to be January 1st. The PT test came back negative. Has anyone experienced this before?