Hello there,
I was thinking Lungs I guess to help support your immune system and help move Qi in the body.
I think this sequence looks good...and trust your body...if something doesn't feel right, it probably isn't. Also remember when we are pregnant we have relaxin coursing through our system (hormone that makes our ligaments and tissues softer and more flexible). I mention this because I chased my edge in my yin practice when I was pregnant (Dragon series to be specific) and wasn't being very responsible and I suffered for weeks feeling very unstable in my hips afterwards.
I think just as important as learning to open the Spleen meridian is really learning to embrace the psychology of the Spleen / Earth Element. This represents the relationship with our body, being nourished, developing self care routines, making food/eating something sacred and meaningful, eating whole foods, practicing gratitude and moderation and taking whatever time you need to digest and assimilate your experiences in life.
There is a great book I would highly recommend if you are interested in this approach to health and wellness called 'Rhythms of Change' by Mary Saunders. It is the psychology behind how yin and yang move through our lives. Like Yin Yoga it is a simple book....but full of amazing challenges and insights....
marysaundershealth.com/rhythms-of-change/
All the best with everything!
Cathy
cathykeenan.com