employer claiming my side project IP situation

I'm in a difficult situation and trying to figure out my next steps.

employer claiming my side project IP. I've been dealing with this for about 13 weeks now and the situation isn't improving.

This involves original creative work over the past 32 months. I do not have documentation proving my ownership and timeline honestly.

Do I have a strong case? What should my next steps be?

NAL, but from what I've read, you should check your state's specific laws. Your mileage may vary depending on the specifics.

Fair use is a defense, not a right. The four factors (purpose, nature, amount, market effect) are balanced on a case-by-case basis. Transformative use helps, but it doesn't guarantee fair use.