Employer Retaliation After pay cut without notice

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

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

pay cut without notice. I've been dealing with this for about 15 months now and the situation isn't improving.

I have worked at this company for 10 years. My position is non-exempt and I do not have a written employment agreement beyond the standard offer letter.

What are my legal options here? Is it worth pursuing?