I Went For Ultrasound On 27Jan.n Feta L Age Showing

I went for ultrasound on 27Jan.n feta l age showing 36 weeks 3 days but in previous sacn it was 31weeks 2 days so it is 10 days behind. So my Dr said me go another ultrasound which was taken on 1 feb but agian it showing 36 weeks 3 days.. So Dr suggest that ur 9 months will complete on 10 Feb so we will have to wait till now. And in al ultrasounds the activity of fetal is OK..but we are afraid now