Dawn Phenomenon?

The dawn phenomenon is really tricky. I have had type 2 for about eight years now and for the first five I was in denial, and never took the Metformin and ate and drank what I like. Then I had a diabetic review which did not look good. Now I test every day at different times, but I cannot understand the variance in BG levels. Yesterday morning I took a reading at 1.5 hours after breakfast and it was 17.2. The breakfast consisted of two hard boiled eggs, two wholemeal toasts with butter and marmite, and I had a smallish fried lunch. Then I took a reading at 17.30 hours, and it had dropped to 8.6 !
Was the first reading a rogue one ? I worry about my feet, but fortunately have got on to an NHS programme where I have them looked at once a month. Eyesight is perfect so that's a bonus. When hungry, my legs go weak, but that might be a by product of a bad spinal problem,. However once I have eaten a roll and a chocolate bar, the leg feeling is restored.