i did the 3 hour one twice because i changed doctors. passed both, but i think the second one was just a tad high, so little that he never wanted me to do the test again. both were concentrated orange drinks, the second time was better because they kept it in the fridge and it was like a cold drink.
i hated both because for me fasting is a mental thing..when you know you cant have water., you start to panic, purely mental thing.
hope yours is much better x