I dont know if I can do this.

So I'm 26 weeks pregnant with my second, my first is only 16 months.. some days I have a hard time just being able to deal with my 16 month old without feeling like I'm going mad, and I don't know how I'm going to manage taking care of him and my newborn.. we live in a very small trailer and my husband works 14 hour days so I'm basically on my own.. I feel so overwhelmed and scared that I'm not going to be able to hold it together when my daughter is born.. can anyone give me some advice/words of encouragement here? everyone thinks I'm absolutely nuts for having a second child so soon, especially with our living situation, i hardly get any friendly encouragement from anyone. I feel like I'm drowning in my anxiety.