C-section fear!?!?

So like any first time mom, I fear the unknown. I'm 32 weeks and at my last appointment my doctor wanted to know more about my husbands and my family history because my son keeps measuring to be so tall. He seemed extremely concerned about the men and women in my family being born with such massive shoulders (it's caused a lot of tearing and struggle in the women in my family). My doctor even commented about my build (I really am broad shouldered for a woman). Anyway, he casually said "we'll do a c-section before forcing him out out of you." Don't get me wrong, I get what he means. But since then, I have felt so much anxiety at the mention of a c-section. I don't even know why. Not knowing what your first child birthing experience is going to be like is scary enough. I wish I didn't feel so much anxiety over this! Any mamas whos gone through this or knows how I feel? I feel like it would've been easier for me to think about a c-section while in labor because I'm at that point. But with 8 weeks to anticipate the unknown it's scaring the day lights out of me!