SO this is the first time this has ever happened to me. I am having my period BUT, there is no blood just the shedding of the walls. I'm not scared or freaked out by it. But I suppose most people would be. I just want to know why. I looked it up but all I get are girls saying they feel like they are on but aren't. This is the first period I have had in four months. No I was not pregnant. I have went through the motions of having a period (cramping, nausea, etc.) but this is the official first one. Last time something similar to this happened was when I went two months without one and then I started but is was blackish blood but majority just lining. Can anyone explain why this happens?