Why so high?

Could you be coming down with something? High levels for no reason can often be due to the body fighting something.

Is the new insulin pen from the same batch? Have you checked your fridge temperature?
Could it be stress? Hormones? The weather? Weight changed? Anything else changed?

It could well be the weather, I think a lot of people have increased insulin absorption when it's hot so have hypos (I think there was a thread the other day asking who else had had a hypo where it was hot) but I've never found that, and when it's particularly warm, I tend to run high

Amongst all the other reasons suggested, I run higher when I'm not as active as usual. My job in education is pretty active and it's been hard to keep to the usual levels of activity since mid-March and being home most of that time. The two weeks I was least active, I was doubling my fast-acting ratios and adding 50% to basal. Also aware personally that I have put on a little weight with being less active and that could also be why my basal levels have remained higher whilst I've been able to edge down the fast-acting as I'm trying to get back to my usual levels of activity even though I'm still home, not at work.