stressed momma

So me and my fiancé have been together for 3 years now. We have a daughter who is 15 months and another baby on the way. I knew when we first got together that he wanted to be a police officer. Both of my parents are police officers so I knew how demanding the job was going to be. He graduated college in the first year we were together and found a old security job. I was pregnant at the time and on bed rest at 25 weeks. He lost his job. He was unemployed for 4 months. I had a c section so I couldn't go back to work for awhile. He got a job offer 2 and a half hours away from friends and family of any sort. The job was finally a good paying job. We got our bills caught up and everything was good. We saved up money saved the date for our wedding even sent out invites ( our wedding is 3 months away) , we decided to try for another baby and got pregnant,we even bought our first car together. Well after 7 months of being at this job he got fired again. I'm our only income. I only make $800 a month and our rent is $1000. I'm so frustrated and upset. I feel every time I get pregnant he loses his job. Now I have to wonder how I'm going to pay rent so we don't get evicted. I'm going to have to cancel our wedding and everything. It just sucks moving so far away from any help and being helpless. He's applied everywhere and no one is getting back to him. Just once I need something good to happen :( I'm one stressed out momma