I hope things get easier for you.Im a big crisp addict one of the things i did find usefull on one of my many diet's is to open a tin of chick peas drain them and put some garlic salt on them and roast them they go crispy.
most post op'ers have been through this, (i know how you feel, it's so hard). what helped me was to look at the before and after photos.
your so near, just stick with it and it will all be over before you know it.
sending you my best wishes and big hugs, sue.