This is Dr. David
I am sorry you are having these symptoms.
you could have a pinched nerve in your neck or spinal stenosis in your neck causing this pins and needles in your left arm and leg
you need to see a doctor and get an MRI scan of your neck spine to look for pinched nerves and spinal stenosis.
there are treatments for this
the sooner you get diagnosed and treated, the sooner you get pressure taken off of your nerves.