Vbac mommas

So I'm a very small women being only 4'11 and 95 pounds, with my first baby I ended up having an emergency c section after 4 hours of pushing because he was sunny side up and was so big ( 9 pounds) now with this baby my doctor said she's measuring a whole pound smaller and I will have no problem delivering vaginally but she's leaving it up to me to decide. I'm nervous that the same situation will happen again. Do you think I should just trust my doctor and go the vaginal route since baby is meausring a pound smaller and isn't sunny side up? I'm just so nervous the same thing will happen again! Any tips?!