According to your LMP-your gestational age
till 8th of july is 10weeks4days.
According to your USG on1/6/12-your gestational age is 10weeks2days.
you have done USG scan at very early stage of your pregnancy
because,at this stage ,only sac appears,then foetal node,after that cardiac activity appears.
So consult your gynaecologist &repeat your ultrasound