Prepartum depression

I am currently 20 weeks pregnant. I dont have a job and im in college on a full ride scholarship. I have no money and my search for a job has been terrible. As soon as i get an interview they change their minds. My grades have been going down. Im guessing from the stress of the pregnancy and everything changing in my life. My scholarship is at risk if my grades keep slipping. I don't know how my life got this bad. I dont know what to do.