I would just direct oral dose her with a needless syringe.
I place the hen on a table or somewhere waist high (convenient for me and my back!). I stand against the table and pull the hen to my belly/chest. Drape my left arm over her and lock her in with my elbow and body (she's basically...
Cadbury is lovely.
If you are allergic to the medication, do be aware you don't want to eat/use her eggs either, so if you aren't certain that you'll be able to i.d. her egg to throw it out, then I'd wait to see if she gets better without the abx or perhaps choose something different to use...
I'd make sure the give her a good cleanup.
Did she seem to expel a soft shell membrane or did you see it?
I'd give the Calcium Citrate with D3 for a week. Hopefully this will firm up the shells, but it sounds like she may have had a membrane leak if you are seeing what looked like albumen...