@Mel dCP have a good one and yep, pics please!
@MeiChanski I'm with
@WuTwo and Mel on this one - find out how much x amount of fast-acting carb raises you by. I've mentioned before that when I'm treating a hypo, according to the level I start at I take x amount of jelly babies, sit on my hands for 15 mins, test, if I'm where I want to be I only eat slower acting carbs if I'm about to do something physical, so I definitely wouldn't have been munching a jam sandwich. Also if you eat something with slow acting carbs, or fat, you'll slow down the action of any additional fast acting carbs you need to take. If my first jelly babies haven't done the trick and I'm not back up enough, x more jelly babies, another 15 mins, another test and so on.
I get symptoms close to a bg of 4; I think you may have mentioned that your hypo awareness has fallen off. If that's right, I can see why you were hoping for cgm with alarms as opposed to Libre. If that's the case, I'd say you really need to make that clear to your diabetes team, maybe have that conversation with the nurse.
It's also worth working on measuring what different foods do in terms of spikes, as you seem to yo-yo a lot which is hard to control. And looking fore patterns can help; for instance I developed a pattern of often being high after lunch and worked out that I was eating something that had an effect I hadn't allowed for .
Hope that helps