I have tingling in my left shoulder and down my left arm all the way to my hand. should i be concerned? no prior shoulder problems or anything

Yes: It could be due to a pinch nerve in your neck and not to your shoulder at all.You should have it check to r/o other possible causes.

Need a diagnosis: Difficult to determine without an examination. Differential diagnosis could be cervical radiculopathy (pinched nerve in neck), brachial plexopathy, peripheral nerve entrapment such as carpal tunnel syndrome (not uncommon for cts pain to travel up the arm), or even myofascial pain with trigger points. Would suggest physiatric evaluation for definitive diagnosis and treatment.