I started my period on the 8th and it was about 6-7 days long. Well on the 18th I noticed some bleeding. It was not spotting. It was a lighter version of a period. It was an off red creamy color with a lot of brown. I have had it now for 4 days. Now its a little lighter. light pink and light brown. I also noticed this last month but it only lasted a day. WHat is this and should I worry?! Also, the 1st two days i had lower back menstrual like cramps.