What is the pain like and where?
I've been getting some pain the back, upper area, just under the bra line and sometimes higher.
I'm wondering if it's gastro-related or not?
Have you tried simethicone capsules? They are effective against gas.
It may be that your back pain is referred from some GI source. Take it easy on what you eat this weekend -- no gassy or spicy foods.
Perhaps you may get better advice on a GI forum? See what you can find up under the Forums menu.
Best wishes.