heading into a bad place

I have no idea why or what has really caused this particular downward spiral...I don't want to be bothered..I feel like crying because I am so upset and I don't know what about...How can I fix what is wrong if I don't even know..I was ok I thought I was ok but I'm not..I just want to go and hide at home...I don't want to be around anyone..I just want to lay down and not have to do anything...I don't know what is wrong..but I can't stop it...I don't know how..