Firstly, no....you do not have to eat to go up. Because your liver produces glucose whether you eat or not. There are many people who have higher readings in the morning after sleeping all night with nothing but a sip or two of water than they did right before bedtime.
Sickness, especially infections, cause people with diabetes to have very high sugars even though their drug intake and food intake is well regulated.
Secondly, let me have some fun......
my readings were I say it's
3:10- 157 149 and your reading was 5% high
3:40- 107 117 and your reading was 10% low
4:00- 127 114 and your reading was 10% high
4:40- 109 109
What I've done here is to create a hypothetical scenario in which I allow the measurement accuracy of your meter and your sampling procedure of +/- 10% (which is pretty observable with the equipment and my procedure) -
your readings of 107 and 127 might very well, with typical finger-stick meters, have been taken on the same finger of the same blood drop 30 seconds apart.
Allowing for measurement inaccuracy, your curve might not be "double humped" at all..... and your last three readings are really just asymptotic to your baseline.
What you see in your data presentation is a major peak which happened at about 1:30 after you ate which was likely around 175-200 ug/dL and you are a little slower than your med folks would like you to be about dissipating the sugar. That's diabetes.....or, maybe a bit too much carb in your meal. You can probably choose carbs which are whole-grains and things that output slower to meet your goals. But it's sure important to keep a good balanced diet. It's quite a game, this diabetes.... keeps you on your toes....
Your two hour reading, is, no doubt, higher than you want. But I wouldn't be worried about the "double hump" - you are probably not eating a "test meal" either.... the fat content of what you eat can make the sugar output extend in time, also.... fatty foods output their sugar more slowly than simple carbs or proteins. So a "double hump" could actually be caused by the side dish of fettucine carbonara while the "first hump" was the bread that you ate without butter..... If you ate the bread WITH a lot of butter and the fatty pasta, you would have a single higher hump at 3 hours after you ate.
Hope this helps. I defer to others on the G aspects.... I'm the wrong gender to know about this one
- congratulations and my very, very best wishes for a happy and healthy both of you.