After 2 years with no such feedback, my newly promoted manager says I have an attitude problem

I’ve been working at the same company for 2 years and recently got a new manager (Senior Marketing Strategist). A new marketing consultant was also brought in, and my KRAs were changed completely. I was removed from SEO and moved towards lead generation through Reddit and LinkedIn because our website’s organic performance has been declining.
Recently, my manager told me I’ve been delaying work, have an attitude problem, and have been disrespectful in the way I speak to people. Honestly, this came as a shock because in my 2 years here, I’ve never received this kind of feedback, and I genuinely don’t believe I’ve been disrespectful towards anyone.
She also said I haven’t prepared the required calendar, but I had already prepared it and shared it with the consultant and in the main group. The consultant apparently didn’t see it, but it was still shared.
I feel like the feedback about my work is being passed on without the complete context, and I’m now wondering if I’m being slowly pushed out, especially since I work quite independently.
Would love an outside perspective, am I overthinking this, or should I be concerned and start taking precautions?