Wow- now that's one depressing statement!  I am pregnant as well & I am in the habit of referring to my new body as: fat, but deep down I know that I am not really fat, I'm having a baby.  If putting on 40lbs is what it takes to bring a healthy baby into this world, than so be it.  Besides, life's a long time- I'm sure I'll be thin again one day. 

I hope you do find shelter.  If nothing else, keep this in mind: life changes over night.  You might feel fat, lonely & broke right now, but maybe a year from now your outlook will have changed.  Good luck!