Sick BF

My boyfriend has been sick for over a week. He's freezing cold all the time, goosebumps and all. His temp is always 97, and still is now. He sleeps all day long literally all day when he gets home from work. He works 3am-1pm or 12:30am-9:00am. I feel terrible I don't know why this is happening to him anyone have an idea? Sometimes he drinks energy drinks, not sure if they correlate also he says he might be depressed because of our situation. He works for Vons and I'm 9 months pregnant he's scared.