Usually my periods last up to 4 days but last month my period was so irregular, I had unprotected sex on the 12th, two days before my period was due, & when it did come it was just very light spotting for about 9 days which was uncommon for me. Around the 26th of October I took a Pregnancy test & it came out Negative. On the 19th of this month, I started spotting very light again, the next day it stopped & I still haven't had a "normal regular flow period", is there something wrong ?