Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Bikes: 86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
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At this point, I wouldn't "undo it".
In the future, if you have a flat, inspect for "fold" marks. IF it has any, I'd replace it at that time.
Tube sizing seems somewhat iffy. I've seen some marked similar to your size that needed to stretch noticeably just to reach the minimum (1.75)marked size and others that didn't.
My 26x1.5" tires have tubes marked 1.75x 2.1 and there was no problem.