TIL about 3D printing patented designs

I publish illustrative scenarios prepared by my practice. All participants and conversations are fictional. The fictional posts are not posts by real users, accounts of client experiences, or reports of actual results.
Illustrative scenario prepared by my practice.
For informational purposes only. This is not legal advice. Laws vary by jurisdiction. Consult a qualified attorney for advice specific to your situation.
Hypothetical question

Quick background on my situation — any input appreciated.

3D printing patented designs. I've been dealing with this for about 11 weeks now and the situation isn't improving.

This involves content I created over the past 25 months. I do not have documentation proving my ownership and timeline.

Am I overthinking this or is this a real legal issue worth pursuing?