I did my period on the 4th of December than on the 29th of December af…

I did my period on the 4th of December than on the 29th of December after meeting with my husband I saw blood through out that day I did not saw it again thank the next day I noticed it only when I pee very light and Pink with Minor pains on my left abdomen while my normal period supposed to be on the 1st Jan pt test negative. Have anyone experience it before thanks