Big hugs for you, Petra and take big, deep breaths, Honey.
You did the right thing & Boeboe is fine, it takes time for meds to work
and even might take a couple weeks for hives to completely go away.
I think you can give the meds every 12 hours, hopefully more experienced
members can advise you on how often to give.
Yes, an insect bite can bring hives on, even one flea if they're susceptible.
Praying over you both right now & sending LOVE...let us know how she does!