How many nights would you home treat croup before heading to a gp?

DD has the flu & nasty croup cough at night. Last night was the second night, & she's no better with the flu today. No coughing at all any other time though, just late at night.

She's still feeding fine & standing in the steamed up bathroom has soothed it both nights so far.

I haven't been worried about her breathing & i have ventolin here if I need it (I think its just a weaker version of the same type of steroid?)

I don't really wanna go get the meds JIC, when I think we are handling it ok, but I'm wondering if I'm doing the wrong thing???