Is it back pain or kidney pain?

No one knows.

Seriously, I have had this weird back pain for a week now and it is getting to the point where I am freaking out.  Last Wednesday night I had the ladies over for bible study and we were sitting around the table talking, eating, praying for a couple of hours and when everyone got up to go, I stood and was like "OH!  That hurts!"  My lower back was killing me.  By the next morning it hurt to move.  
Well, the pain started to subside and then over the weekend it kicked up again but now only on the right side and the pain radiates up and wraps around to my side.  It's honestly, making me want to cry at times.  I'm not sure what to do.  Frank rubbed my back last night and he said that it felt tighter on that side so maybe it's a muscle thing but there are other things going on.  I just don't feel...well.  Does that make sense?  It's like something is just off.  I'm queasy a lot and tired and really, it's just a miserable feeling.

Could this be a kidney stone?  Is it just a muscle spasm?  All I know is that I need some relief.  Fast!