That bad breath and the white you can't get off sounds like thrush. I've had it several times due to my gi problems. Ask for a yeast pill instead of the crap they make you swallow, that will make you more miserable! You should probably see a gastroenterologist and they can look at your stomach and throat. I also have chronic constipation and I take miralax around 3x a day. Keep drinking lots of warm liquids and soups, buy a humidifier and leave by your bed at night. Fats and fiber always help me avocados, grapes, bananas, steel cut oats. Try relaxing your pelvic floor by lying down and putting a hot pad over your lower stomach for 30 min a day. Also kegel exercises. Stool softeners pill form without the stimulant should soften stool without cramping. I hope something helps!