I think you may either have a typo in that highlighted sentence above or you are confusing HbA1c and BG. You would not be alive with a BG of 100mmol/l!!! BG meters only read up to 33mmols/l.
Either 100 was your HbA1c which would be in mmols/mol and cannot be compared with a finger prick reading, as they are measuring very different things, or perhaps you were meaning a finger prick of 10mmols/l and it was a typo error, which then came down to 5.8mols after 7 days. Even then it depends when those two readings were taken as to any inference you can draw from them. A non diabetic person could have a BG of 10mmols/l (180mg/dl) after a very carb rich meal and a BG of 5.8mmols/l (104mg/dl) 3 hours later in the same day. If they were both waking fasting readings then that would make sense, although waking/fasting readings usually take several weeks/months even to come down that much and are usually the last to respond to dietary changes.
