When it's flatish it can be either from the dose too high or the dose too low. I'd try a lower dose 1st and see if you get back to blue #s. If you don't in a couple cycles, then I'd try a higher dose. Personally I wouldn't worry about getting a huge amount of data today. Nothing wrong with it if you can get it and that appeals to you, but I don't know that it will tell you a lot since you have a curve from yesterday. At this point what you don't know is whether the #s you are seeing are a product of the dose being a bit too high, or if she's now sat in these numbers for long enough that the dose has become too low. I think you'll only know with a dose change.
In any case, hope today goes great and you have a nice Easter!