who has laid on their back???

Candace
I need to know how many women have laid on their back during their pregnancy and has had or not had a healthy baby. 
I'm freaking out a Lil cause I have laid on my back a few time during my pregnancy. I don't stay long. Most of the time I have something I'm leaning on like a pillow or blanket or husband. Or I'm propped up higher. Or my legs are up bent( feet flat on bed knees in the air) but I'm sure I have laid flat a few times too. 
39 weeks tomorrow and I am having anxiety. ☹️😔