HELP!!!!

So on The 28th of October I should of started my period..nothing came, then yesterday still nothing until the end of the day I had some light bleeding but nothing like normal. No cramping, not the slightest feeling I was starting my period, well a couple hours later I go to change and notice bleeding has stopped but just to be safe i act like it's still going. And today I get in the shower, nothing.

Now that the descriptive part is over, does anyone have any idea why I could be doing this? pregnancy has obviously crossed my mind but how should I know exactly what to look for you know?!! Help!! I need everyone!!!