its not recommended. you do it at your own risk

okay I was trying to put it on my lower back because I woke up and my back was killing me

depends on where you put it. On your uterus, no. But on your back or whatever I don't see why you wouldn't be able to

I don't think so. you can try a warm bottle or ice pack. that's what I had to use through my pregnancy. although you may want to ask your doctor.

is it bad ?

no!!