I had a inguinal hernia surgery a year and a 1/2ago. I had the mesh put in and I am now having sharp pains. Should I be concerned?

Yes. Have your surgeon see you. He/she knows what to do.
Not too much. Could be many things, all of which are not dangerous. Depending on the severity, try rest, ice, and anti-inflammatory meds. If mild and occasional, don't worry at all. If more severe, and escalating, see your surgeon or primary care for an exam. Hope this helps!