@Folding - welcome to these forums. I see that you're a new member.

Also (((safe hugs))) I'm so sorry to hear that your T is MIA. I hope she is doing okay, for your sake.

What you can do is call her office back and see if they can find an alternative T to speak with you until your regular T comes back. You can describe your concerns and worries during that session with a different T. Your regular T will understand. But sometimes the staff doesn't know to offer that or ask you if that's what you need; they tend to leave it up to you to ask them about that option instead. If you can do that, it might help you while you wait for your T to be fully available again.

Like nurses and doctors and EMTs and paramedics, psychotherapists are also experiencing burnout during this pandemic - esp. if there's been a tragedy in their own family or their own circle of friends. It makes it harder for them to deal with their jobs when they have lost someone close to them and need therapy themselves to cope with bereavement, traumatic losses, etc. It's not the clients' responsibility to know those things, but we are in relationship with our T's, so we naturally worry and care about their well-being, too. That's the hard part about being in psychotherapy.

Hang in there. Ask the agency where your T works if they can find you a T to see you on the weeks your current T can't see you. This way, you still have continuity of care with a different T and can work out all the anxieties about that T being MIA.

In the meantime, there's a lot of forums on this site that can offer you support.