34 weeks day 4

kelan po kau ng ultrasound mi? 35 weeks na po aq pero dq pa alam kng ilan kls si baby at kng cephalic sia , last ultrasound ko 6mos plng sia cephalic 1st time mom kase aq should i worry po ba late na ba aq for ultrasound ? pinapabalik aq ni OB dec 2 pa tas mg 37weeks aq DEC4