I haven't had any major problems with my treatment really, other than my varying sensitivity levels but tonight I am having a pickle. SO I thought I would come to the place where these things are solved. I am sat at 10.2mmol and have been since 7:30pm, I don't do well when my numbers are past 7.8 never mind double digits - luckily this is rare. All day I have been nice and steady in the 5s (Dexcom) and for tea tonight I had 30g carbs in new potatoes with fish, a usual low carbish tea, which hasn't played up before. Just as I was bolusing and was putting out the food I creeped up to 7ish. I thought no bother so I added an extra top up to accommodate for the 7. Now here is the odd thing, I waited 10-15 min with FIASP and ate. The 7 kept creeping up which is odd as it's been hours from last food/snack) and kept creeping, then to 11.4 (potentially the potatoes contributed here, also my highest in months). After a while of stress, full on rage bolusing all the time and I have 10 units IOB now (which is more than most days all meals). An hour passed..nothing, no dip nothing. So I get a new vial of FIASP and put in a new Pod (expires this eve anyway) and boom into arm and 3 more units. Nothing..not even a dip, however it has just levelled off now. So I rush about doing housework to get me moving and my dex is slowly coming down to 8.4mmol, grand, perfect finally the new pod is a success. Test on meter, 10.2mmol. No idea where Dex got the drop from then. I have never taken so much insulin in one go, especially as there is not a lot of working carbs in my body, I am honestly at a loss. Weird thing is, last night I had an odd incident again, I was at 6.9 before bed, ok bit higher I will just pop a bit in and snooze. Dexcom buzzing, 6.8, 7.0, 6.9 this went on for all night til 5am (yes I am knackered) and in the end I must have bolused 3-4 units for what is normally .3 to bring me down in range. Then today, all is normal, no basal change, carb ration for lunch was perfect...no changes, its like it didn't happen. So thoughts. Honeymoon ending in splutters? It has been a year + FIASP water effect (seen by @tim2000s ?) even with a site change and new vial. Potential illness cropping up? I feel 100 percent, and no colds coming around in office as yet, but it may be a warning. There are no secret carbs due to weighing items. So anyway, I am now trying to calm myself as stress is just gona raise the situation, but never in my small time as a t1 has my body shown any resistance to insulin, normally it is scarily quick to react and very sensitive. I will update - hopefully below 7 prior to bed with a health bedside table of lucozade, in case it suddenly goes shooting down. Edit: casually did a ketone test to see if the mountains of insulin are being lost but its 0.1 so its definitely working.