I have been diabetic for 17 years now, and I have had a few tough times too. A few months ago I was struggling, I would have random highs of 20 at lunch when j hadn't done anything to warrant it. I have an amazing diabetes care team, we worked together to realise it was my background insulin that wasnt carrying me through enough, although my overall hba1c was good I was having spikes and it felt so frustrating. The levemir insulin had worked for me for years, but wasn't working as well anymore. I think I felt it more this time because I was trying to exercise and the balancing act was just too extreme! I would cut my insulin because of a low and it would go too high!! It was only a short period but I felt things getting worse not better!
I am now on a different insulin and I am going on the pump in February( this is for different reasons and me and my partner would like to try for another child) but my point is things can look so so bleak at times and I know u say u have a fab support network, use them. There are ways round things and there is light at the end of the tunnel, don't struggle along, speak to your care team and see what they suggest. Even 17 years into being diabetic we have our ups and downs and things need changing, don't give up! good luck, message me any time x x