I want to cry

I want to cry. I don't know what I'm doing and I think I fucked up with what I am working on. I am covering for someone who is out of the office and I think I messed up or something. I got a call and I sent the email and I sent the instructions, but something just isn't adding up. Everything could be fine and it could all get sorted out, but then on Monday the woman I am covering for will know that it was me who messed up. But still, I could be OK and I just don't know. I am having a horrible day and I want to cry and go home and not do anything at all. I couldn't fall asleep last night for the longest time and I'm sure that's not helping. I want it to be 5 right now. right. now. I don't know what to do and I can't relax or stop stressing or anything like that. I should have asked more questions when I wasn't sure instead of proceeding. I need to learn how to do that. I just assume that I know, but I don't. I am just so unhappy right now.

This is so stupid to be so upset about. I don't think I am upset about the job, but I can't figure what is making me so feel so down.