3rd degree tear

Caroline
I had a third degree laceration with my first born son, (he was 10 pounds) and am 22 weeks tomorrow with my 2nd son. I am wondering if anyone has delivered naturally after a 3rd degree tear and if they had any complications or tore more, etc. 
My doctor has recommended c-section for this birth as he is afraid my body won't heal down there well again. Im not totally opposed to it, but would rather prefer a natural birth. Any advice/info would be greatly appreciated!