I Didn't Offer Resignation. My Manager "accepted" My Resignation Effective Immediately. Do I Still Show Up To Work Tomorrow?

Location: PA, contract worker

Called off today d.t. company issues and needed a mental health day. It's been a long battle to try to find a work flow that works for me but still provides adequate patient care. I'm working in people's homes for what it matters.

I sent a long text highlighting the issues, that the manager and I agreed on solutions last week that another department blew out of the water last night, into today and nuked my entire day.

I let them know that changing a scheduled shift when I'm expected to contact patient's the night before after I've clocked out for the day and have already done my schedule is incredibly inappropriate.

I let them know that we've been working on issues, and that I'm going to take the day to reflect, but if we're not able to find resolution I may move to cancel my contract as an act of desperation.

She ignored everything else basically, and said sometimes things in health care need to change ASAP, sorry we couldn't make it work, and I accept your resignation immediately.

Which whatever. Not the end of the world. Contract is over in 3 weeks anyways and they're a pain. But can she do that? I didn't offer to resign. It was a day off where I was contemplating my options. Can I force them to fire me from here? If they do, there's a 30 day buy out clause in my contract. Either way, my plan is to show up to work tomorrow ready to work.

In what ways do I need to make it clear that "considering cancelling the contract" is not me immediately offering my resignation?

Edit: they also want rid of me, but have no cause to fire. They've been increasingly making it difficult to perform my job activities. The company went through a massive restructuring in October and they can no longer afford my contract. So I am feeling pressure from that, too, and really don't want to give in to that pressure.