Salam alikoum,
Sorry sister to write in English, I do not have an Arabic language in my system...Any ways, hope what I'm writing will help you inchallah...
The most serious problem during pregnancy that involves cats is an infection with toxoplasmosis during pregnancy acquired by contact with the stool from an infected cat. The risk to the baby increases the later in the pregnancy the new infection is acquired. Since cats are normally infected when they hunt and catch small rodents, it is less likely that one would be infected if it is an inside cat. In addition, the most common site for humans to come into contact with the cat's stools outside is probably in the garden -- cats like to bury their bowel movements in the soft soil in the garden. So keeping the cats in reduces the chance of accidentally coming in contace with cat feces. So I vote for keeping the cats indoors and having your husband do the litterpan cleaning until after the baby is born. Wear gloves while gardening. Be very careful not to eat undercooked meat (a more common route for infection) and wear gloves or carefully wash your hands after handling raw meat.
Do not be afraid, Allah will give lots of babies inchallah, do not give up hopes, try again and if not go and see a doctor...
salam alikoum