9th week nothing on gestational sac

Hello there! Is it possible not to see anything on the sac on on your 9th week but might come out on 10th or 11th? I just had my 2nd transV earlier and didnt see anything. I dont want to believer i would have miscarriage. Pls enlighten me mommies. Thanksss #pleasehelp #advicepls #firstbaby