Fiancé left me... 2 yr old and baby on the way

So my fiancé, daughter and I just got back from vacation.. Had a dumb argument and he packs up and leaves! We have a 2 year old together and now another baby on the way (I'm 16 weeks)... He says I'm giving him unwanted stress and doesn't want to be with me anymore. Nothing will change his decision and it's final for him. I have always helped him with his business and stayed home with our daughter so I have NO money in my personal account. Everything is in my name! I'm totally screwed! I have to deal with a child, finding a job, moving, hopefully be able to pay my bills, look for daycare, make sure I eat and not stress out too much for the baby! I'm so miserable right now!