Sudden Spike

Don't worry, us younger folk get suitably ignored by the medical professionals too... I think it's just their way. Unless your leg is hanging off, they don't like to pay much attention!

As for the spike: if you haven't changed anything in your diet and medication, then it could be that your body is fighting a minor virus or you are more stressed than usual.
For me, if I'm getting a cold, the first thing that I notice is a higher than usual blood sugar level.

Look after yourself, drink plenty, and if it doesn't happen again just chalk it up to one of those random occurances that us diabetics have to endure.
If it does recur, then your medication or diet may need a little tweaking.

While Oats are a better option than most grains they are still starchy carbs and turn into blood glucose. Any grain product bread , rice, pasta, couscous is very likely to cause problems. How our individual bodies react to different food differs from person to person which is why testing after meals. is so useful.
9.7 shortly after a meal is above guidelines but 1 hour is really a bit too soon after a meal to test,. Although most us set lower personal targets the most recent official UK NICE guideline targets are under 8.5 at least 90 minutes after a meal. Personally I set a lower target but never test before 2 hours after the finish of a meal and usually add 15 or 20 minutes extra delay if I suspect the meal contained slow burning carbs.

From my personal experience of my own body I know bread or any grain produces a long duration rise in my blood glucose level, while I can eat good quality real Italian icecream without any major spike.

You are likely to find with starchy carbohydrates there are threshold amounts in any meal and in any 24 hour period above which your body simply cannot deal with, and once insulin reserves are used up you will see a general background rise in blood glucose levels that could last a week or more. Lowering blood glucose levels is more like flying a hot air balloon than Concorde; you don't get anywhere fast and be preapred to get blown off course.