Possible pregnancy or simply stress related?

My fiance and I are ttc and I'm trying to notice changes without getting my hopes up. I don't feel as if I am under more stress than usual in fact I should be under less stress. Normally every month I get my period on the 8th or 9th but this month is was a little over a week early and only lasted 3 days. Since then I've been very moody, tired, and near crying a lot with a lot of headaches. I have cramping there but I have a few cysts on my ovaries which could lead to that too.

I'm not taking a pregnancy test unless I don't get my period next month because as I said I don't want to get myself worked up and I also know of the rate for very early miscarriages. Just in your opinion, does it sound like a possible pregnancy or something else? Hard to tell just based on things I'm sure.