Yes, I think I would get myself a glucose monitor, if I were you. The cheapest one I know is the Codefree on Amazon. The test strips are about £8 for 50. Sometime you can find free monitors, but the test strips are often much more expensive.
I think that knowledge is a good thing, and I would much rather KNOW... It came as quite a shock, when I got my monitor, to discover what effect different foods have. Milk sends me quite high. So no more lattes.
But chocolate doesn't have as bad an effect.
I spike ridiculously high with wheat in any form, except pasta which has a slower peak. Everyone is different. You may find that different foods affect you.
But at least if you have the test results, you can make an informed decision - maybe choosing a different portion size of a problem food, or swapping it for something else.
Let us know how you get on?