Loss of pregnancy symptoms

Calina • Married to a wonderful man. Proud mommy of Kylen 9/29/2011 and my Angel baby Adrienne born sleeping on 9/24/2009. Pregnant! due 9/7/2015.
I was having morning sickness for about a week and sore breasts throughout my pregnancy so far, I woke up today with hardly any symptoms. I'm 6 weeks 5 days. Could I be miscarrying? I'm really worried!