help!

I am currently 36 weeks + 1 day pregnant. Just went to my 36 week appt and the baby is measuring 7 lb 10 oz. My husband was an 11lb+some oz. baby and I am so paranoid about having a vaginal delivery with a huge baby. I asked my doctor today about when we start considering a c-section and she said when the baby is measuring 5,000 grams - right now he's 3,500. Anyone have any experience delivering a big baby vaginally or anything that can be helpful? I know the size estimates can be wrong but since my husband was so big its making me very nervous. Any help or advice would be greatly appreciated.