Pain in Left Arm for 6-7 Months, Numbness in Last Two Fingers, EMG Normal

Repeat EMG, do cervical mri scan, see a neurosurgeon for advice (osteopath might help as well)

Hi, from the information given, it look like a neuropathic issue, either cubital nerve or a cervical nerve root impingment. The EMG test might sometimes be underestimating a compression.
A clinical examination and further anamnestic informations should help figuring out what is happening.

Hi,
Usually the EMG/ENG could be negative at the beginning of some nerve compression.
The first option could be an ulnar nerve entrapment at the elbow or a low cervical root compression.
Less often there could be a plexopathy or a metabolic or esle neuropathy.
The examination of the arm is the first step.

You probly have a contracture of the posterior scapular muscles. This muscular cramp gives typical irradiating pain.
I would give a trial session of dry needling .

Electromyography is not 100% sensitive for the diagnosis of Ulnar entrapment syndrome: your symptoms are suggestive of this, a thorough clinical examination and ultrasound study of your elbow could help.