Super exhausted I could just pass out

So for this last week I’ve never felt this tired my entire 23 yrs of living,I work overnights and my schedule had gotten a little messed up while moving into my new home and being up when I usually would be sleeping but I get enough sleep like I’ve had way less sleep than I have now and have made it perfectly fine but If I don’t take a nap on my lunch I feel like I’m just SO tired Like I’ll just all of a sudden get super super dizzy and feel like I’m on the verge of passing out And I screwed up my app and im not sure how to fix it so im unsure if im due in 2 days or 3 days late if going off the last few months. Has anyone had this problem is it just I am that tired or a vitamin deficiency or has this been one of your first signs?