wondering about my mental state - thoughts on Cipralex

I am really concerned about my mental state these days. My lack of ability to do anything is not good. I just can't function. I am not moving on any front. My headaches are bad, my motivation is negligible and I can't move on any front. I don't want to leave my apt and I just can't function. I wonder if the Cipralex is is not working any more? does that happen? does it just stop working? I have not idea. I am scared though. I can't work. I am not going to work, but working at home in my pj's or yoga pants. This is not good. Not good at all.