I don’t think it’s different to when a T refers a client to another T for the amount of time they can’t be there. I would be very concerned if the T you are about to see doesn’t accept to work with you on a short term basis, until your current T gets better. It’s a scary time of uncertainty and you have to do what makes you feel better.

I’m so sorry this is such a stressful time for you. I’m glad your T is feeling better, but it doesn’t mean that this is easy for you. 2020 has threatened so much already and I think I would definitely struggle with this too.