Since she's on such a tiny dose, but not much green, not sure she's ready for the next dose step. Too many numbers above 120. I see she's going on antibiotic. Did they do a urine culture to identify which bug is causing the UTI? It's possible resolving the infection will drop her numbers more. I know you said you've got lots other things in your life right now. Do you think you'd be able to keep monitoring closely should the numbers drop due to the UTI being resolved.
The dose after this, for cats still seeing some higher blues, is a drop dose. You push the plunger in hard, then insert the syringe into the pen/vial, release the plunger and it vacuums up a drop.