I suffer from a form of constipation where I go everyday 3 -5 times but only pass small hard stools. I have looked at milk as a reason and have had some success with Oat milk. But not completely as I am also intolerant of Sulphites and find that in all kinds of foods. Sulphites also make me feel really grim and I must sleep or get a horrendous headache. Anyone else have these symptoms and can help?