Help!

Quick story, the women in our family often have miscarriages and don't really register high levels of hcg until later then their period. I have had some really funky spotting the last few days. My period has been regular all my life, starting heavy and then working its way out. Two days ago it didn't come, but some brownish spotting did, not enough to fill up a pantyliner. The next day same situation, and like a drop of actual blood. Today I have nothing going on at all. So I want to take a pregnancy test, but I know it wouldn't even show yet because of family history. So besides the obvious pregnancy symptoms do you all have any signs that I should watch for while I'm waiting? Or any ideas as to what might be going on?