HELP 😩😩😩 PLEASE READ 😩😩😩

So since the beginning of my pregnancy, my Obgyn hasn’t changed my due date to how the baby has been measuring. They’re going by what my last menstrual period date was, and also basing it off of a normal 28 day cycle. I’ve normally got a 14-21 day cycle. Anywho- since the beginning, my Obgyn has stuck with October 20, 2019 as my due date. However- baby has always measured three days ahead of that. (Due date would be October 17)

Well I went to be seen today for my regular appointment. I had my doctor check me because I’ve been having pains similar to what I experienced with my daughter when I went into back labor, and I can also feel baby’s head in my pelvis. They checked, baby is definitely low, I’m 2cm dilated, and my belly is measuring at 37 weeks. (I’m 34 weeks and 4 days according to the Obgyn’s predicted due date) They sent me for a sizing ultrasound to double check the size, and baby is measuring at 36+4, and is already almost 7 lbs. (my other two babies were born at 40+4 weighing 8lbs 10oz via induction, and 40+2 weighing 8 lbs 8oz via natural labor)

My questions are this:

1) what are the chances of my due date changing? Asking because I’ve never been in so much excruciating, debilitating pain this early on- and I can get a membrane sweep at 37 weeks to possibly help labor along. (I literally can’t walk, or stand for longer than a minute or two- which makes everything extremely difficult as a stay at home mom with two other young children 😩)

2) what are the chances of me going into labor earlier with my 3rd child, even if my first two were late?

3) how many of you ladies have similar experiences and what was the outcome?

I just need to see a light at the end of this very long tunnel. I just want to be able to move again 😭😭