I'm another big fan of split dose Levemir. For me, I need more than double during the day compared to at night. My current dose is 16 units in the morning and just 3.5 at night and if I have had a very active day, I drop 1-2 units from that night time dose and if I am less active the next day, I add it back on the next night to keep things level and the change is effective during that 12 hour period, so I can chop and change from day to day as required..
I also find my Libre sensors consistently read about 1mmol lower than my finger prick when my levels are low, so 3.5 will actually be about 4.5 or maybe even higher and 2.5 on the Libre will be about 3.6. I don't get too concerned about these low readings although obviously take action to prevent them happening regularly. In range readings are usually pretty close and I haven't had too many high readings that I have double checked since starting using Libre, so I am not sure how they compare. I tend to know when I am too high and needing a correction.
You sound like you are at your wits end and worn to a frazzle trying to do the right thing but worried all the time that you are not getting it right. I know it is frightening in the beginning as an adult patient and it must be 10x worse as a parent of a child, but you really are doing incredibly well and these early months are by far the most difficult both in terms of not having enough knowledge and experience, worry itself and then the pancreas unhelpfully throwing out some insulin when you least expect it just to put a big spanner in the works of all your carefully calculated doses.
Hang in there, it really will get easier.
