Hi Heather!
Curious why the vet had you go from 1u to 2u back on the 26th? We usually recommend people move in 0.5u increments, or even 0.25u depending on your numbers. Otherwise it is easy to miss the right dose.
You had a nadir on the low side on 2/27 on 1.5u. From there I would probably have tried a dose of 1.25, and if the #s weren't good enough on that, maybe something like 1.4. The picture is a little confusing the past few days with the dose changes, so I would try to pick one dose and stick with it (maybe 1.25 or 1.5) for a couple days, and try to get more mid-cycle data like Sue recommended.
I definitely would not even consider jumping up to 3u like the vet suggested. It's not clear to me without more mid-cycle data if the 2u is too much, so I wouldn't want to raise at all from there w/o getting more data. If you do determine a dose increase is warranted (based on PS and nadir data, not on PS data alone), then I would move in 0.25 or 0.5 increments.
Hope that helps! Keep asking whatever questions you have, and we will try to help you as best we can!
If you have any emergenies, be sure to post on Health, as traffic can often be slow here in PZI.