I also have severe sensativity to clothing. I buy my pants a size or two too big and I'm VERY picking about my panites. The first thing I do when I get home from work is put on a night shirt and take of my panties! There are days when I have to go without a bra because the pressure is too bad. Luckily, I'm small chested and can get away with it ok!
I use miralax daily. It is a prescription osmotic laxative and it keeps my C in check. If you are struggling with C, you may want to ask your dr about this. You do have to give it a couple of days to start working and it may cause some extra bloating and gas in the first couple of weeks but that goes away.
-------------------- Taking it one day at a time.....