Do not use a wet pillow case! Especially natural fibre containing ones. The fibres swell and can become very close to air tight and cause suffocation.
I would suggest holding in in a tub with correct husbandry and just let it be and not cause any more stress. Stress can cause poor sheds and often a stressed snake will not work to get shed off just leave it a few days with correct conditions and give it a rock to rub on and let it be.