You can go to HDB & try applying for a rental flat. They will escalate your case to get a flat asap, especially when you are heavily pregnant now. You can register & tell the officers that you got no place to stay right now & when the baby is born, it will be very difficult for you guys. Hopefully before you deliver, you will get a flat. Do prepare some money during collection of keys. For your mother case, it's better to have a talk with her. Tell her to give her fullest support to you & be much supportive. No harm talking to her in nicer way.