Standing desk vs sitting desk

Eva
I am getting a new desk for work and I have been wanting a standing desk for a while because it's really good for posture. 
I realized that I might not want a standing desk in the months ahead. I am 9 weeks along but have heard I'll want to sit a lot. 
I could also get a tall stool or chair so that I can sit at the standing desk if need be. Does anyone have input about this?? This is my first pregnancy so I really don't know what I'm doing here :)
Thanks!