So I just came from a docs appt... she said my uterus is measuring 30 but I'm 26 almost 27.… so next…

So I just came from a docs appt... she said my uterus is measuring 30 but I'm 26 almost 27.… so next week I'm scheduled for the glucose test... I asked what does it mean if I'm measuring big...she says it means either I have gd or the baby is big... but I'm still not showing... and then they said I have to schedule an fetal echo test like wyd they have Me doing all this stuff...every visit they say his heart beat is perfect so wtf do I need a echo test for ( I think they want my money)... but is anyone else measuring big???