The pregnant mouse is the card of poverty: poor as a mouse. It is also about your needs being met.
There is also emotional stress and the feel of threat (you might feel very small in a much larger world). Are you focusing on lack and in need of support?
The mouse also tells us to be patient. The seeds are planted and will take some time to develop and be delivered, like a baby.
What is the larger concept? How do we rethink the situation to make the best choice?
Are you on the other side of the mountain? Are you making your return trip home?
Always look to what your options are and use your intuition too.
You are loved and blessed.