I've never had a T go on an extended leave, but I wanted to say I was really impressed that even through the scariness of the situation you can 'see the potential for growth'. That is a really great way of looking at it.

As for some ideas -Would it be possible to join any support groups or group therapy while she is gone? Or even a social group in your church or community? Those might be things that could provide a lot of support but wouldn't interfere with you going back to individual therapy when her maternity leave is over.....

I also like Perna's idea of a project or course.

And hopefully PC can be a good source of support for you, too.