Newbie to Freestyle Libre

[rowlyc]

Hi, just started using freestyle libre on Thursday (I realise that's not long). However finding it a bit frustrating. First night I had it, it said I had a below 3 hypo during the night, which I didnt feel or wake up during....so was scared, I'm fairly newly diagnosed and never had a during the night hypo yet (to my knowledge).
So last night I set an alarm for 1:30, scanned libre 4.2, finger pricked 6.8.
Today 12:00 scanned 4.2, finger pricked 5.8.
I realise there's a lag, but am I being a bit unrealistic thinking this is quite a variance? Could there be something wrong with the libre, does it take time to bed in, etc? Thank you.

 

[urbanracer]

How closely does it correlate during waking hours?

If you sleep on the sensor, there is a theory that the pressure pushes interstitial fluids away from the needle so it has less to measure and will thus give a lower reading.