Shoulder dystocia

Any other moms have this and been able to ask to be induced early or csection !? I’m starting to panic went to my appointment today and mr man is measuring 5 weeks ahead 😨😨😬😬 I know it could be fluid or him etc I have an ultrasound on Tuesday to know for sure but my first was only 7lbs 1/4oz and if he’s any bigger I have a feeling the same result or worse is going to happen 😭😭 and I don’t want my baby boy to have a fractured arm or worse to get him out.