It will take time for your gynecomastia surgery to show results. I typically have my patients wear a compressive vest for 4 weeks after surgery to help keep swelling down. Depending on the type of gynecomastia surgery you had, it will take some time. Follow the directions of your surgeon.
You are still in the healing stage, and swelling is normal. This will make it difficult for you to notice any difference until after everything has settled down. To speed up this process it is important that you rest your upper body and wear your compression vest. Make sure that you follow up with your PS who can monitor your healing. Best wishes!