Had a 2 level fusion and discoptomy two years ago. will i always have sharp intermittent pain in my very upper back and neck?

Yes: sometimes with fusion the area doesn't bend and transmits bending to other vertebrae which do not usually bend thus causes some pain If the pain increases and becomes constant then see a provider to re X ray and exam you You may need more therapy, medications, orr other alternative therapies to treat the pain

Possibly: Posterior discectomy, fusion, with internal fixation closets hypomobility in this segment above and below the area of fusion, leading to early degenerative changes at the segments. Medial branch of the dorsal ramus nerve has been shown to cause persistent pain due to degenerative arthritic changes from zygopophyseal joints in the spine. Medications, therapy, facet blocks are treatment options.

A MR I is in order: Surgery for the lumbar spine is not considered curative.At best it halts or slow down the progression of degeneration of the spine temporarily. When you stated "you have intermittent pain" this undoubtedly serves as the basis of some of your symptoms.In some patients these changes in the spine are asymptomatic in your case an EMG, thorough eval and MRI or CT are recommended .

Depends: If the fusion was successful then you should not have pain. You can get problems above and below the fused segment that could be responsible for the sharp intermittent pains