Thanks for posting
Well according to your description and on location of the pain (left side) it is more likely that you are suffering from acute pancreatitis
which might be as a result of gallstones (as a complication). Gallstones could could present with similar pains on the left side but most at times they occur at epigastric or right hypochondrial region of the abdomen. In order to confirm this your doctor will need to run serum amylase, serum lipase, urine amylase, abdominal ultrasound
and/or CT scan. Other blood tests like Complete blood count
, fasting blood sugar, urine test etc.
Also important to rule out peptic ulcer
diseases which could be responsible for radiation to back and neck.
Your back and neck pain could be isolated diseases conditions such as fibromyalgia
, neuralgia or other illness.
You will need to get an appointment with an internist for review and further treatment.
Hope this helps