connections

I am woken in the night with an intense lower back pain, I then go for a wee and the pain and the tight feeling down my body goes, and I can go back to bed. This feeling only happens when I am laying down and I believe that the build up of urine lays and irritates my kidneys. I tried getting up and not going to the loo to see if pain and discomfortwent when I sat up, but no it didnt I had to have a wee and it lessoned. I dont think that this is the only reason my lower back aches, it just worsons it. I think the other reason is its where my spine twist and my hips tilt its all connected in some way.