Your aunt died as a child? Or as an adult? People don't die of type 2 diabetes very often, type 1 (which isn't inherited, or not much, and you mostly get it when quite young) kills more often, afaik.
Risk factors: Obesity, particularly around the waist, age, family members with type 2, particularly if they got it before they were 50 or so.
Ok, so cotton pants and a pad isn't working so well for you. Hmmm, I'd be tempted to recommend a moon cup, they're softer and nicer than tampons, but they might pose a problem anyway. Even the tiniest tampons, even with a bit of lube on them, to ease them in?
If you're so tight, maybe your pelvic floor is pretty good. I'd be tempted to try sleeping on a towel, and scooting to the loo first and last thing. Tampons overnight are a bit dodge, and I've managed ok this way before. (Presumably the pad irritates during the day, too?)