S.C.
Believe it or not I was just researchig b12 deficiency right before i came on here. I hope she is no longer receiving injections. maybe a sublingual b12 would be fine. http://www.veganoutreach.org/health/B122002.pdf
that is where i was researching. I was looking for info because i recently began taking b12 and i'm suddenly getting tremors. i am pretty sure i am deficient and i read in some reports that at the beginning of treatment patients have gotten tremors or maybe even seizures that went away after some weeks. but it wasn't too clear if they had them before they took the supplements. but that was what it seemed to imply.
Did your daughter get tremors when she started her b12 as her body adjusted? I wish you both well, and don't ever let anyone, especially the doctors, tell you you can't.