Secondary wound closure/healing

[Jerry]

5 weeks ago i had a small growth removed from my hard palate by a local periodontist. It was sent away for biopsy and came back as a benign epithelial hyperplasia. It was removed by excisional biopsy and allowed to heal by secondary closure. After 5 weeks I now have a larger and firmer "knot" where the biopsy was taken. This has me slightly concerned. Is this likely the scar/healing process or should i go in for a second look? How long should I wait for healing/swelling to subside. Thanks for any info.