First ultrasound post FET

This is nuts! I still can’t wrap my head around this tiny little baby girl growing inside of me. Yesterday at exactly 6 weeks we got to see a strong heart beat of 108 even though she is measuring at 5w5d which my RE said is ok for when we transferred. For those who have had ultrasounds at 6 weeks does this look pretty normal? The RE said we saw everything we needed to see and it looked good but I can’t help but to be a nervous wreck. She has been a slow grower from the start, but she is PGS tested so I know she is a fighter. I just can’t help but be cautiously excited which is so weird 😞 Any help or advice would be greatly appreciated!