ad kencing manis

Aslkum nak tny Ada x pegalaman mcm sy nurse ckp sy mse minum aer gula amek darah first ok selepas 2 jam amek darah sy x ok...kenapa ye...sy x mkn n minum apa2 sepanjng 2 jam tu.......tolong mcm Mana nk kurang kn kecing manis Kat darah........?????