You are welcome
@Teapot99. I didn't want to trigger an alarm bell with you about my lunch out, however I got the bolus dose right but not the timing.
Because the tostie was a scrumptious, greasy cheese and mushroom toastie it became a classic example of when I should have used a split bolus. After lunch I had to pick up some food shopping and that meant a modest walk across the town. The walking in the warmth of yesterday afternoon, straight after eating, reduced my natural insulin resistance and my 8 pre lunch bolus insulin units got to my BG well before that greasy toastie digested into glucose. My CGM did its job and triggered an Alert for both falling BG and for dropping my BG down to 4.3.
Under other circumstances I would have done an fp, verified the CGM alert and treated the hypo in its making with up to 15 gms of carbs. But I was walking in the sun and close to the supermarket shade, with a small tub of everyday mints at 1gm carbs each, in a handy pocket. So I just put 2 only in my mouth, sucked (resisting crunching) these - knowing that this was the quickest way of getting some fast glucose into my blood; and I then walked slightly less energetically to the shop. Those 2 gms of fast carbs were enough to cause the CGM low alert to stop thinking I was crashing and a few mins later my CGM sensor told my phone I was back up to 4.9 and a little later up to 6.0. The toastie had finally released its carbs, provided the necessary glucose and all was well. Those meagre 2 fast carbs were sufficient to provide a temporary respite while the digesting toastie caught up. Yet not enough to put me onto the diabetes roller coaster, when a bigger hypo response could have taken me into hyper territory once the toastie had joined the BG party.
This might seem like unnecessary brinkmanship and being cocky. But in practice I was confident that my bolus dose was about right, that 4.3 didn't need me to panic and getting to the shade indoors was an important consideration as part of my response. Ironically, its possible that had I become anxious or panicky, hormones such as adrenaline or cortisol may well have come to play and triggered glucose releases from the liver's glucose store - providing not just an equivalent hypo initial response but almost certainly also putting me onto the roller coaster.
Knowledge dispels fear. I knew what was underway with my bolus, digestion and BG behaviour, stayed calm because of that knowledge and the apparent falling BG was managed.