Hey
@Smoof !
I was once just like you! - now a couple years later I am only slightly less like you lol
This thing is all mental so the first thing you have to do is reset how you view things - You have to let go of 'the way it used to be' and just focus on 'the best it can be' - and always carry a backpack full of snacks with you everywhere... like room to room even.
It takes lots of practice, and attention - it wont just happen after 2 years, 5 years, or 10 years - it happens whenever you give it enough of your time and understanding to figure stuff out.
You'll need to figure out how many carbs you need prior to Zumba vs swimming, or what to eat if you're feeling good and wanna do another 15 minutes. These are things you will need to fail at a bunch of times before really nailing them down.
I found keeping a log book with me really helped. I wrote everything down, tested many times each day, before after and during exercise to see what was happening with my BS, and how things effected me. After about a year of this I found i no longer needed it and have most things worked out now - or close enough that i can adjust on the fly without too large of an issue.
The trick is patients, and consistency over long periods while slowing making changes. You can't just jump into a random second class anymore - you have to plan it a bit in advance now.
Also - get really good at noticing the small changes in your body - the tiny tingles, and strange feelings on on your skin, or ears, or tip of your nose, and what the various headaches mean lol
(yep - i can now tell a low headache apart from a high headache with fairly good accuracy - or what it means when my ears tingle, or when the little space under my tongue is tingling - you'll never feel these signs more then when your first diagnosed and if you wait to long they can vanish and then you wont be able to use them to help out)