Emergency Vet appointments

Due to crazy circumstances we adopted a new baby into our family. They did not give her the proper vaccines at this particular animal shelter resulting in my 11 yr old dog catching kennel cough. This may sound minor but shes been battling it for over 3 weeks now. I've been giving her OTC medicine which isn't really helping. I've never had to do this but I'm out of money and we need to take all 3 of our babies in for kennel cough and updated vaccines. Please help us out. We will truly appreciate any help. :)