I feel generally confused about relationships/life/etc all of the time.

Therapy is a big investment (even if your copay is small it adds up over time). If you're not progressing or are just unsure it's worth it--I think it's healthy to want to change T's or take a break. Perhaps you forgot to go because you don't need therapy right now or she is not helping. Or maybe your mental condition plus the fact that Christmas puts everyone's schedules into turmoil made you forget.

It seems like if you still want/need therapy--now would be a good time for a change. With her about to go on maternity leave it might be harder to make progress and you are going to have to make a break from her anyways.

Since you are making a pros and cons list it sounds like you are ready to make that break from her soon. January might be the month--it's that time of year where many of us make changes in our life. Hope it all goes well for you.