Hi Dawn - Lin's right - it is worse to 'suddenly' bring our blood glucose back down to lower levels, it's taken the body a little while to get used to the higher ones you still have at the moment so we have to give it a little while to get em back down again.
It isn't always 'this hard' no - even though you think it's totally unlikely to ever happen - you will honestly soon get used to it all, then it becomes a habit - in other words you'll find yourself doing everything without any noticeable effort at all. most of the time.
And you'll learn to be an expert, adjusting your own insulin doses as and when required, because in time, you'll be taught how to do this - and it's all based on logic, a bit of mental arithmetic (but there's always help for that in various ways if mental arithmetic isn't your forte so don't stress about that either) and will make perfect sense to you. You will not be ignored and left on your own to struggle - your hand will metaphorically be held from now on, for the rest of your life, whenever you need it, and the rushing is over - your GP has got you to the station and your bum on a train seat - so make yourself comfy cos it's a long journey in front of you - so don't forget to enjoy it and participate in anything you see on offer along the way!