Only one I had was at the end of a hard run with a bit of a sprint finish I was puffing away catching my breath and as a car drove by one youngish lad shouted out the window " you need to ease off the pies mate". A bit obvious but it made me smile all the same.
I don't want to disagree with exiled about drinking before running because people have got much more experience than me. However I find if I drink 60 mins before a run I need to go to the loo just before the race/ run starts so I always now have a good drink 5 - 10 mins before a run and I've never had a stitch. If you try it in training you'll know whether you get a stitch or not.
Personally I'd drop the pace for the runs, and you will definately get to 10k if you are doing 7k and then you know you have done this before the race. Its just a bit of a confidence boost. I just ran the furthest I have by running nice and steady. Its much easier! Your pace is 51 minute 10k pace which is pretty good going.
I did my first 10k not that long ago and really enjoyed it. The above advice all seems sensible. The only thing I would add is make sure you have done some road running before you race as the treadmill is quite a bit different to road running ( I do both ).
Also with regards to drinking, I'd test this in one of your practice runs before the day but I have a good drink just five minutes before a run, probably 200-300 mil. You wont need the loo as when you start running apparently the kidney stops processing and it doesnt have time to get through the system anyway. It certainly helps me and I sweat a fair bit.
With rest days if the race is Sunday I wouldn't run after Weds or Thursday but thats just me.