The pregnant mouse is the card of poverty: poor as a mouse.
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.
The issue is of our success today. There may be some physical fear coming about. Stay Grounded. The mouse is telling us to take little steps also. The mouse also tells us that we require some patience.
Become the observer and know that things happen in God's time not ours, yet the seeds are planted.
We are loved and blessed.