Nervous due to ultrasound today

Al

37 weeks 4 days; So OB ordered an ultrasound today because he thinks baby boy is to big for me to deliver vaginally, this is my first child & im only 19 with a rather small pelvis I guess. going in @ 3:45 and gonna find out how this is going down. Baby is at about 8 pounds they think right now gonna find out a more accurate size. But a plus is i am also kinda excited I get to see baby boy on the screen one last time though before the big day!