4th c-section before 38w

Hi all, i am due to have my 4th baby/c-section this May. I was originally scheduled for my c-section on May 11 which would have been 38w 3 days which i was fine with. However they called yesterday and re-scheduled me for May 5th which will be 37w 4d. I cant help but feel like this is too early.  I recall my doctor mentioning when i told her i was scheduled for 38.5 weeks that they typically do not wait that long for a 4th section. I am not really sure why, maybe because they worry about spontaneous labor? I would feel more comfortable if it was at least 38 weeks. I already have pretty small babies (all around 6.5lbs). Anyone else with repeat sections scheduled so early? Should i say something to the doctor?