Can Sculptra form into a nodule within 24 hrs of the injection? What are other possible causes? Can plugged cannula be culprit?

Received two vials of Sculptra three weeks ago, some of which was injected along my jawline. The following day I noticed a fixed, hard 4-6 mm oblong lump on my right jawline, palpable but not visible, at the site of the cannula insertion. I notified my dermatologist and was instructed to keep massaging the area. No improvement, I followed up again and was offered a variety of non-reassuring explanations such as, "it could have been there all along." Now it's tender and I have a swollen node.