Next time you use a fabric that's so unstable, first pre-wash madly, then hang it for at least 24 hrs, with clips, from a hanger. Only then can you attempt cutting, when it's stretched out at its maximum. I'm sure you've heard of not doing a hem till a bias-cut garment has hung like this - same principle, using gravity up front. It works better to hang first, then cut, then hang again, and only finally hem.
Congratulations on making it through unscathed through what sounds like a major culture-shock event :-). May your feet recover soon...
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