Hi! Yep choose the pregnancy option. There's a page that calculates how many calories you should have based on how many bfs per day once you've signed up. I'm bfing at the moment too so I will be the same as you!

You still get access to all the preseason stuff if you sign up now so you can cram it in, though I think in your welcome email or somewhere they put in the most important tasks to complete. The fitness test task was set on Monday - I have yet to do it because I'm dreading it lol