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Hi,
your fasting sounds ok.
Yes, eating high sugar foods can cause a spike, and 144 1 hour after McDonalds is probably not excessive.
To get a better idea, you probably should be measuring on at least a few days running as one off testing is not going to give you a good overall picture. And if you're really concerned get your doctor to do a HA1C test which gives a measure of average blood sugar levels over the past 2 - 3 months. Depending on this you could be fine or maybe do more testing.
But from what you've posted, which is minimal, I would think that at worst you may have prediabetes, but likely you are pretty normal and just need to watch your diet (don't eat McDonald's too often) and exercise regularly.
Hope this helps.