Itchy Nexplanon Implant

Could anyone tell me if they have experienced itchiness around the site of their implant? I had mine inserted about 3 weeks ago, it was very painful but healed after a couple of days. I randomly now experience a horrible pain where it lies. It does not last long but is very random. I have also notice in the past couple of days my are is so itchy! I’m really trying my best not to scratch it. Please help.