Back pain remedies?

I'm at work so I have limited resources - and by limited I mean I have ibuprofen which I already took 5 of with no pain relief.

Had to shovel heavy ice/slush/snow last night out of the driveway and then slept on a couch. As a result I can barely twist & bend without being in a cringeworthy amount of pain.

... and I have to do a lot of bending and twisting and reaching for 6.5 more hours before I can go home and sink into a hot bath.

Any tips for pain management?
Back pain remedies?
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