Low blood sugars

I've experienced something of an anomaly today. I've eaten normally but my bs have remained low (for me) as below:

Fasting: 6.9 (normal for me)
noon: 5.1
lunch +2: 4.6
Before supper: 5.5
Supper +2: 5.1
Bedtime: 5.9

My food today has been

B - Greek yoghurt, berries, flaxseed and sprinkling of chopped walnut
L - avocado, prawns and mayo, cucumber and salad leaves
Supper - to test my bs I had 2 slices of white bread spread with coleslaw and cream cheese. I don't normally eat bread as it spikes me to double figures but I've tested every 30 mins and at +2 was 5.1 and +3 was 5.9

I feel ok but lacking in energy.

Does this seem right to you?

Thank you for the reassurance. Yes definitely feel a little off. There seems to be a shift taking place. 5.9 fasting this morning.

Hi Brun

Thanks for your thoughts. Definitely wasn't cold! Yesterday was a pyjama day spent mostly in front of a roaring log fire, doing very little, but thank you for the info about the cold.

I'm going with @Enclave's theory as my energy has returned but I've maintained the lower numbers today too, apart from experimenting again with a single slice of bread this morning. I spiked after 35 mins, which explains why I missed it yesterday when I was testing hourly.