I think my due date is wrong

I have been having contractions for a while now they are currently 1 1/2 hours apart, my iron is low, and my heart rate is constantly high. I think my due date is wrong but my doctor want me to wait until May 8th but last week they told me that the baby weigh 6lbs and 5 ozs they say i am 34 weeks but the baby is weighing at 37 they say. I think they just want to torture me bc I have a repeat c-section, my hands and feet are always swollen he pushes down constantly. I tried the pregnancy belt it doesnt work. So why do the ER keep sending me back home?