I've had tonnes of allergy tests! All done on the NHS though!
Your GP can do whats called a RAST test. This involves taking some blood and sending it to a lab to get tested.
The downside of these tests is that you have to tell them what you think your daughter may be allergic to, as they will only test for the things you suggest. So, you could go saying "I think my daughter is allergic to house dust mites, egg white and feathers" and they'll come back saying "Yip, your daughter is allergic to house dust mites/egg white and feathers"
So it's just like confirmation!
I then had to push to get skin prick tests done at a hospital 35 miles away in Glasgow. They are a bit more random and could show up things you've never even thought about!
Then I also had patch tests done at a dermatology department in another hospital. They were good because they show up things you'd never though of as well!
I'd push your GP for referrals and tests on the NHS!
My GP wrote a referal to my mat hosp and it said "Elaine is the most allergic person I have ever met"
Feel free to PM me!
xxx