you can't stop it now igg positive means you develop allergy. allergy can be controlled not cured.
you can approach good homeopathy, act slow to be taken longer time but it's safe results r good.
Have a check-up of child by local qualified doctor --explain to doctor --all details of contact with the dog and how the swelling developed --then let the Dr. examine your child----ok.
Hope the pessary was prescribed by your doctor as part of treatment of her health problems --if so --let her drink milk ; eat some fruits and rice or such non-oily non-spicy food and drink 12 glasses of water today --there is very rare chances of any side effects after this.
Clean the area well with water ;dry and apply coconut oil for some time and wash with soap and water and dry the area --if buring sensation persists ---apply any cream available in home for burns/wounds etc for few days.
It's highly unlikely that water goes inside your lung if you aren't having any symptoms like shortness of breath, so don't worry about secondary drowning or anything else.
No need let her be free from medicine so as to naturally build immunity in her body.
Give balance diet only and milk at least 2 glasses full cream daily.
MBBS Bachelor of Medicine and Bachelor of Surgery, Certificate in clinical nutrition
General Physician, Trivandrum
Hirayama is associated with distal muscular atrophy, my recommendation will be to consult a physiotherapist and undergo strengthening exercises to prevent or delay further loss of muscle activity.