I know how scared you must feel as diabetes runs in my family (at least 6 family members I know of have it) and my dad was only 34 when he was diagnosed even though he was very fit and healthy (he is in the military and is 40 now)
He got tested for diabetes after he collapsed in the gym when his blood sugar got so low he nearly fell into a coma. The excessive thirst and urinating were ignored by my dad because it never occurred to him someone young and very fit could become diabetic.
Do your best to get healthier and give yourself the best possible chance of avoiding this disease, even though sometimes it may seem like your genes have stacked the odds against you (well, I feel this way sometimes)
My thoughts are with you and your mom