Living situation rant

My husband lost his job in March unexpectedly.. And I was just working pt running my own cleaning business. We tried our best to keep up with the rent but it was too much and we had to move in June.
My MIL was kind enough to let us move in with her and her bf.. But right now it's me, husband, five year old and soon to be newborn all in one bedroom.
They don't have air conditioning and the in laws smoke in their bedroom (which still goes all over the house) so we have a window unit going in our room so I don't die from this heat. 
My husband did get a job finally but it's going to take some time before we can move. We also only have one car; and he starts work at 6am.. So we have to figure out taking daughter to school (no bus option), taking husband to work, and having a newborn. Along with the terrible sleeping arrangement of all being in one bedroom.. 
I'm miserable..I know there will be a light at the end of the tunnel eventually.. But right now I'm really stressed and bumming about it. It also really irks me that I have no way to keep my pregnant self, daughter, and once she is born, newborn, away from their second hand smoke. I'm grateful for a roof over our heads but so unhappy that they continue to smoke in the house and I have no choice but to subject us to this.
I am 38w pregnant.