Only in the morning

My question is.. I just bought a new bed that me and my wife sleep on. I have no history of any kind of back pain. My back has never hurt for any reason. Now for some reason after buying this new bed. I know I sleep the same way as I always have. Every morning when I first wake up, my back is hurting. It's my mid back area on both sides. As soon as I get up out of bed about 2 to 5 minutes the pain or tightness goes away 100%. What  seems to be my problem ? Is this bed I'm sleeping on to soft or to firm ? Thanks for any info you can give me. My e-mail address is  ***@****   Thanks.  Brandon

[bernie431]

I have all the same symptoms: stinging back pain on the left side at kidney level when waking up which disappears after walking around. All my key health indicators are good.
Recently I feel as if an inner organ may have lost its containment and moves around - perhaps pressing on another organ during the night and then moving to another location when walking around upright. Could this be similar to a hernia condition?
BK