I can understand why you'd be nervous with conflicting answers from different docs.
You're correct that protein in urine can be a sign of a UTI *or* an indicator of preeclampsia. I'm wondering if they are leaning towards a preeclampsia diagnosis because you also have had some high blood pressure readings. The diagnostic criteria for preeclampsia is at least two high blood pressure readings (140/90 or above, either number) at least six hours apart plus 300+ mg protein in a 24 hour urine collection.
Elevated liver enzymes can also be a sign of preeclampsia or HELLP syndrome. I would tend to trust my doc (over random docs coming in your room in the middle of the night) but you could always ask if the hospital has a MFM (maternal fetal medicine) doc specializing in high risk pregnancies that you could consult with. (unless that is the specialist you just saw!)
Usually they don't induce for preeclampsia or gestational hypertension until 37 weeks at the earliest, but if your liver enzymes get high enough or you have other signs of severe preeclampsia they might consider delivering sooner.
I hope this helps, please update us as you are able.
Hypothyroid mom to Connor and Claire
(severe pre-e at 38 weeks & "mild" pre-e at 37 weeks)
& baby Annabelle
(chronic HTN & GD, superimposed pre-e @34 weeks, induction @37 weeks)