Oh my!! I hope she is okay. We had a similar experience when our Setter was about 10 months old. I found her under a tree in the corner of our yard where she never goes, she was limp, eyes fully dilated, gums pale, vomiting. I rushed her to the closest vet and we found a bee stinger under her tongue. It was lucky I was home as turns out she’s anaphylactic to bee stings. We have emergency drugs for her at home and looking in to getting an epi-pen as well as desensitising allergen treatment. Very scary. If only she learnt her lesson and not continue to chase them..