C-section

Before anyone judges this I want to let them know I am extremely small. Pre pregnancy I was 84 pounds and barely 5 feet tall. I have been told if he gets over 6 or 7 pounds i will most likely need a c section anyway. I do not have any other medical conditions that requires me to have it done but in anyone's expiernces have you schelued a c section because you thought it would be best for you? Or do they deny the request? 38 weeks about.