SB1 - It doesn't matter how long you leave it to the next test. If you have a serious blood/sugar problem it is best to know and then treat it. Purchase a blood/sugar test kit from a chemist ( some as cheap as £7 )- it will tell you quickly if you do have excess sugar and the kits come with excellent instructions. Furthermore, when you do decide to have another CAA check, make sure you do 30 minutes of sweaty exercise about 2 hours beforehand - muscles can use up a lot of blood/sugar so that it doesn't appear in urine. That is why diabetics are encouraged to do more physical exercise. I assure you that it works !!