TTC please help..?

Ok.. I starting the baby dance Last Wednesday.. on friday I started my period, 2 weeks early. At first it was brown and not too heavy. Then it turned into red and very heavy. It's tuesday now and yesterday it started to get brown again... Its not heavy.. its more like brown and spotty. Also i've noticed heartburn.. I just started getting it today. I was just wondering if I could still be prego even though I had my period? And how early would the signs come?