Were the new pens out of a new box from the ones you were using? If not, maybe try that. If they were from a new box, you could be coming down with a different infection, or be stressed about something. I've had batches of Fiasp that are just like water. We don't know how well they've been stored and transported before we receive them. Also, just looking at your levels, have you checked for ketones? Sending hugs, as high levels make me feel yuk.
I have seen the same thing.
I got an infection whilst wearing a Libre. When I had symptoms my PG's were like a roller coaster, but for some days after there was nothing I could do to get my PG's down.
If no matter how much insulin you take you don't drop, it must be the insulin. I had this problem a few times and after I changed both pens, basal and fast-acting it finally started to come back. But I need to mention I was on holiday, summertime, very hot outside.
I’ve read that Type Ones have insulin-need responses to Covid-19 that don’t follow the usual pattern for an illness. I’ve also read that Covid-19 takes longer than two weeks to run its course. Have you any symptoms still? Are you following sick day rules?
I hope the highs come down for you soon.