Reaction to injecting Byetta

Patient: I’ve been taking Byetta for about 2 weeks and at first, no negative reactions. However in the past few days whenever I take it I notice itchiness, redness, and a bug bite like bump at the site of injection. Could this be a reaction to the medicine or just the needle, what should I do?

Symptoms: Itchiness, redness, bump at site of injection

Doctor: