I have an ODD student - there's a huge difference between the ODD and the meltdowns because of routine requirements or hypersensitivities.

Meltdowns are harsh, and very much not understood. Those of us who meltdown are looked down on for having meltdowns. I do meltdown still in my 20s, and have been dealing lately with some with major complications in my life because of people not understanding meltdowns.

But if she specifically reacts to specific sensory input, no, it doesn't sound like ODD, it does sound like SPD.

People here have been there, either as parents, themselves, or both.

For where to start:

-Books:
I really like Sensational Kids. The Out of Sync Child is often recommended but I keep not getting around to reading it.

-Diagnosis and treatment:
Occupational Therapists are where you go to for this. OT is really useful. I've been going to OT and its definitely helped me.

-Coping skills:
Lots of people here have been working on developing those. They can be how they have been coping with having a special needs child, or they could be something like "My child has issues with socks, do you have suggestions?"