I'm usually on my period for just 4 days but this time it was longer. On my fifth day (yesterday) which was my last day on my period my pad wasn't red just brown because you know it was ending but when I wiped the toilet paper was pink red with a little cervical mucus but clear. It went away it was just the one time I seen he color. Today my left boob was hurting for five minutes and my boobs never hurt even when I get my period. I took a pregnancy test two days before my period was coming and it was negative. Is it possible to be pregnant right after or during my period?