Delivering a Big Baby Vaginally?!

Emmy
Wondering if any women can share their stories about whether they were able to give birth vaginally or if they had to get a C Section if their baby was measuring big? Our son is measuring 7lbs @ 35.1 weeks. I have not gained a lot of weight nor do I have gestational diabetes - just a big baby! I have slender hips too, so I'm concerned... Any experiences / stories / advice would be awesome!