I am so sorry that you are having to deal with this at the young age of 13. You say that her white blood count is high then it could be an infection that is causing the ringing and dizziness. Maybe she needs antibiotics....I think that she needs to get back in to see her doctor for more testing...she needs answers and so do you!!! I hope that her doctor is doing more tests so you all get some peace of mind. It's not fair to leave there and just have them say we don't know what's wrong...good luck!!!
Hi, the blood cells you mentioned at the end suggest some kind of infection I think.
You could do an internet search on google typing in " Meniere's Disease " I believe that is what your Mum is suffering with, the ringing in her ears is called tinnitus and there is lots of information on the internet about both things.
I think your Mum should see a different doctor as this can be a debilitating illness and she could have a serious accident while she is dizzy.
Unfortunately there is no cure ( if it is Meniere's disease, I am not a doctor remember ) but it can be treated with medication to help relieve the symptoms.
It could be an ear infection that has triggered this off, it would make sense with the high white cell count.
I hope this helps a little, but your Mum really needs to see a different doctor, this can be treated.
Oh and also sometimes she feels like she's going to puke.