Do you think having a ultrasound and pressing really hard on the abdomen can put someone in labor?

I had a ultrasound the tech pressed so hard on my abdomen. I asked her if she had to press that hard and she said yea to get good pictures of the baby. After the hour ultrasound I went home I was still hurting in my stomach. I just figured it would go away. All of sudden I got a cramp in my side I thought I was constipated. I went to the bathroom and sat on the toilet and started to gush water. I rushed myself to the hospital. The doctor told me I was in preterm labor at 21 weeks and that when my water broke the cord slipped past the baby's legs and went into my vagina and there was nothing they could do. My baby died. They ran test on my placenta and too see if I had a infection they were negative. No one knows what happened. It makes it look like the ultrasound had something to do with me loosing the baby.