Is it possible that you ate something different that causes the spike, or that the sample was contaminated? Not been well, that can cause your BM to rise? Did they do the HbA1c, which gives a better picture over a longer period?
I think we all heading towards type II, to a greater or lesser extent. Have you had a look at the various charities online about diabaete, lots of tips from people trying to control their diabetes by diet? It seems different people react differently to the carbohydrate in different foods. Lots of advice from people who have diabetes and what works for them
I would do a food diary, there are lots of apps for this and test before and after meals for a week.