Re: Pain across top of back and chest
I agree sounds like a pulled muscle but could be acid reflux that can also cause chest and back pains. I get muscle pulls for no apparent reason, especially between my ribs, I can tell it's muscular as it's painful if I press on the area, tend to last a few days.
Go see your doctor to be sure, it's better than worrying about it. If it's reflux he'll be able to prescribe you something, but if it's Gaviscon then tell him that's not strong enough and won't really help unless your reflux is occasional and mild. If it's fairly bad then a PPI (proton pump inhibitor) is much better. One tablet normally lasts 24 hours.