It seems really unlikely your T is trying to "get rid of you". Seems more likely he would terminate an unwanted client before leaving for vacation so it's off his mind. Unless you violate basic trust of a T somehow or spend vast amounts of time getting nowhere in your tx, termination is unlikely. There must be another explanation.

He may be saying "vacation" as a euphemism for taking medical leave. Or caring for family with some kind of problem. This might mean he's unsure when things will be resolved.

A boss at work was adopting a child out of a volatile family situation and left work/returned unexpectedly several times, staying longer and shorter than we expected. It was weird not knowing what was up until the big reveal upon her final return.