Taking Bath's

I have not taken a bath in such a long time... and I truly think it will help soothe my back pain (I'm hoping).
Now, since my doctor said to stay away from taking a bath, I have heard the opposite if fine as long as it's warm water.
Does that mean Luke Warm water or warmer? I generally take steaming hot bath's, I know I can't and wouldn't but what is the temp. suppose to be?
No bubbles too, right? What about Salt crystals?
I have a Jacuzzi spa tub, can I use the jets?

I remember reading something saying that we should NOT take baths during pregnancy.

you shouldnt take hot baths cause it will raise your body temp too high for the baby. Luke warm is fine... as long as your water hasnt broken they r ok

luke warm is good but will most likely NOT help your back.
I lived with those Therma care back wraps on during my pregnancy, and a prof. massage once a week made all the difference.