Drained!

I don't think that I have ever felt like this in my life. I feel like I don't have one once of energy left. I don't know what it is that makes me feel this way. I have been sick for some time but I feel that It is emotional also. I am not sure what to do about it. I cannot seem to shake the cold and headache that I have. I don't feel like working, I don't want to talk to anyone. I can't handle pressure. I wish I felt better. I really just feel drained. I just took some vacation time and now I am back at it. Lord, please help me!