Hi, you now need to test, pre meal then two hours after first bite.
This will give you an idea what is happening to your intake of food that you are eating.
Also what sort of diet are you on?
If you have a low reading like you did, retest, if it is similar, take action and get your bloods up.
I would like to see your fasting blood glucose levels. Just to see where you are.
Are you on any other meds?
My condition, is similar to what has happened to you. So if you can post more details tomorrow, your levels, what you have eaten, it will help with what is going on.
Hope this helps.