Ultrasound pic taken 6/4/18

Rebecca • Have two lil boys that I love dearly 1/2/14 & 12/5/17 and a precious lil girl 12/21/18

So I had an ultrasound done I was 13w&1d here I’m now 13w&6d but I’m pretty sure this is a girl! What do y’all think? Was also told that there’s an extra digit on the right hand