I have been trying to google this, but surprisingly, this issue is not common and I can't find much help. I have attached a picture. The issue I am not able to figure out is, why do I sometimes get periods towards the left side of pad? And this issue is ALWAYS towards the left only.

  
The blood flows all in the middle of the pad, like it is supposed to, when I am sleeping, or sitting. I think it is usually normal when I am walking too, but I am unable to figure out when and why it sometimes goes towards the left, and only left, and it's so towards the edge that it would almost leak out and I have to change the pad when this happens. 

This is frustrating because it isn't cos of heavy bleeding, any small amount going left will mean I have to change the pad, whether it is day 1 or day 7. It is worse on the first few days because it happens quicker because of quick flows. 

I have tried to explain in the image, imagine the blue line/wing of the pad is closed up and on the other side of the underwear, as one would wear it. You'll see two patches of red. The centre one is the usual flow, normal one. The second small patch is what appears and is very close to the edge, almost exposed outside and in risk of ruining pants.

Could it be my pelvic misalignment, which messes up when I walk, or maybe when I bend, and the pelvis just turns towards left? Or what could be the issue, and how do I resolve this?

This issue is ruining my life, because I am very hesitant to go out during periods since even a small amount on left of pad like that will mean I have to change the pad or risk my pants getting dirty. 

  
Thank you to everyone!

Periods go towards the left side of pad sometimes