Hmmm.....
Well, I would have probably done things a little bit differently over the past few cycles. If Katie were Bob. Because I knew how Bob would react, so it would have been easier, plus I would have had to deal with whatever happened.
I would have probably have given him .5 two nights ago, and sweated out a possible hypo overnight. Then next morning, I would have gone with 1.5 like you did. Then I would have stuck with 1.5 last night, and this morning, and probably for 3 or 4 more days so that I could see how he reacted to that dose. But again, I had a good feel for what Bob would do with that.
You still have time before dosing her tonight to see what her numbers do until then. If you test at +10 and then at +12, you will have a better picture. I would probably go with 1.5 tonight, and keep it there for at least 4 days. Of course, that assumes you don't see really wonky high or low numbers during that span. But, the wonky numbers would actually serve a purpose if you did see any. Really high highs, or low lows would tell you a lot about what 1.5 (or whatever dose you decide on) does to Katie.
I will be online for a while tonight, and I'll be happy to keep an eye on anything you post. I'm hoping others will see this and also let you know what they think in the meantime.
Carl