Citalopram - bad days?

I'm on citalopram too but I've been on it for about a year. For me it's hard to tell if it works at all - I still feel generally down most of the time - overly emotional, not feeling like doing anything all day, trouble sleeping at night, etc.. I've had periods of time where I felt less crappy than others, but it certainly hasn't been the miracle drug some people say it is. I only keep taking it because I hate having to switch to another drug because of how long it takes to wean off the first and wait months for another to start working.