3 years post op pain, tingling sensation to my left breast, what could this be?

It could just be some scarring around your sensory nerves, but I would suggest getting a mammogram and being examined.

Your symptoms seem to warrant a follow up visit to your surgeon. He or she can provide better advice after a thorough in person evaluation.

Thanks for your inquiry but without an exam it is is hard to advise. I would say the symptoms you are feeling are not common this far out and it is best to be evaluated by your surgeon, good luck.