I’ve been diabetic for nearly 45 years. I can tell you that EVERYTHING affects blood sugar and vice versa; blood sugar affects EVERYTHING! Everyone is different. There is not a “one size“ diagnosis, treatment or prognosis. @Itssjs mentioned the “dawn effect”. There is another similar phenomena called symoji (sp?) effect. They are things that can help explain patterns in blood sugar. Sometimes nothing makes any sense. Just do your best with a lot of testing, data collection, trial and error. Be thankful for the victories. Try again after the flubs. Know that you aren’t alone. My thoughts and prayers are with you as you travel this journey.