No worries! I shouldn't have unnecessarily complicated it for you yesterday; I try to balance the formal guidelines vs caregiver comfort level while advising on pros/cons/risks of various decisions.
I know you're sort of just getting your footing and it can be scary at first. As long as you're monitoring as we suggest, you should be able to catch any potential issues. If you start to see big movement in her BG let us know and we'll take a look.
The reason we say hold the dose is because you don't know how long the antibiotics will take to work - and sometimes they don't work. We've had cats go a month+ with UTIs because wrong antibiotics, antibiotic resistant, etc. And like we mentioned yesterday, you want to keep numbers as low as you can especially when they have infections due to DKA risk.
Also, quick note - there are only a small handful of Moderators ("admin") here, you will see the word Moderator under their username. Anyone can give advice here as it's an open forum, so we say take that into consideration. Look at a person's post history, their spreadsheets, etc. For the most part people here are very good about saying "hey I don't give dose advice" or "I'm not comfortable advising in this situation" and will tag other more experienced members for you.