Help!!

Hello ladies! I am concern because I have been spotting (something brown)  for the past 2 days. It looks like when you are about to get your period, when I pee there is a little bit of blood! I also have abdominal and back pain. But I am not suppose to have my period until 12-5-14.  Could that be that I'm getting my period twice this month? What else can it be? Has anyone experience this before? Thank you! (FYI: I have been TTC for the past 5 weeks)