@G0ldengirl68 how frustrating.
As others have mentioned, it is hard to know what caused the spikes when you don't know your starting point.
In addition to Dawn Phenomenon and food there are many things that can affect your blood sugars such as stress, illness, drugs exercise, a good night sleep, a bad night sleep, .. This graphic lists 42 things. I suspect there are more.
ATTACH=full]47753[/ATTACH]
As for which units to describe on this site, use whatever you feel comfortable with. There are conversion tables that we can use to translate if we don't recognise your numbers. Don't feel you need to be forced into reporting in a way that you find difficult. Whist this site is based in the UK (where mmol/l are used), many people are based in other countries that use the other units.