My T told me that I was the first one to ever ask her for a referral to see someone while she was gone on vacation. She gave me the name of another therapist who practices in her office.

I'm glad I did it because I learned what a good fit my T and I are. The 'substitute' T and me did not click.

On the other hand, if I had seen a therapist with whom I could have resonated with, like my gf's T, it would have been extra helpful

So, it all depends on who you see and whether you feel some kind of connection with the other T.