Question about size/ measurements

Kylie

I am 37 weeks and had an appointment today. Doctor says heartbeat is good and I am 1cm dilated. Based on my fundal measurements she says I'm measuring about 2 weeks behind. I asked and she said it was nothing to worry about; baby is probably just going to be small because I am small. My question is does that change my due date? Should I expect to wait 2 weeks longer?