DH and I both do. He has crohns, and I get migraines. Sometimes I think that it's good because we can both relate to each other and never would get upset at the other if we have to miss an event or something because we know what it's like. But then two people with chronic illnesses means that you miss out on double the stuff, if one person feels fine the other usually doesn't, and even worse sometimes both are feeling bad but we have LO to look after. It's rough!