Hi. I am 32 yr old. On Nov 2st I stated my regular period. On Nov 5 I have sexual intercourse. On Nov 6 I stated to bleed lightly again but nothing that needed more then 1 pad. On Nov 11th and 13th I had sex again. On Nov 15 I woke up to use the bathroom that morning and when I wiped there was light red/pink blood. All day it remained the same but only when I wiped. The next morning I woke up and the pad had this brownish color discharge on it. Something I've never seen before cause I remember saying... What is this. The next day it became red with a regular flow but nothing that needed more then 1/2 pads. On the last day it was very light red/pink again and it was a light flow. This, with the exception of the brown discharge, has only happened to me one time before 3 years ago and I was pregnant with my daughter. I've taken several HPT and I've taken a blood test at the doctor. All of which say I am not pregnant. As of right now I am a week, 5 days, late with my regular cycle. I am also having symptoms like shooting pains like my cycle is on or coming on but it hasn't. I can't sleep on my sides for whatever reason. No matter how much I sleep or eat when I get up to walk around I'm fine at 1st but then my head starts to hurt and I become dizzy/light headed. I've even had lower back pain which I chalk up to being gas but I'm not sure. I've been to the doctor and tested. My blood count seems to be normal and I have no diseases.