Here's my two cents...
I wouldn't be too concerned about the throw up. Do monitor her though; a dog constantly throwing up obviously isn't feeling well. Otherwise, does she have energy, clear eyes, look "normal"? I would continue feedings as usual.
My dogs used to eat raw and kibble (for years), never had issues. I know of many people who feed both and don't have issues. Personally--again, my personal experience. Anyone can chime in with their experiences--I haven't heard of a dog that experienced issues from eating kibble and raw. There are also people (veterinarians and owners) that recommend feeding cooked chicken as part of a homemade diet. I assume their dogs haven't died over eating cooked meat. To me, the biggest issue are cooked bones which can splinter (ouch!). Cooked meat as a treat shouldn't be a problem.
The more foods you offer at this time, the less you know what could be causing upset. Some people have dogs who can't handle poultry. If there is one meat bothering the dog and you're feeding multiple meats at one time, its harder to rule out the exact cause. Hence the tendency to play it safe and only offer one meat at a time. You know your dog, we're just online reading. Educate yourself (which I can see you're doing) and make your own calls. Best wishes!
In the beginning during the transition process, it's best not to feed other stuff, especially cooked, even treats at this stage. That's just adds more for the body to try to adjust to, and increases the risk of digestive upset. Once fully transitioned, yes some dogs do fine with mixed stuff, others not so much. It just depends on the dog.