After cycling through a few anti-depressants, I tried Cymbalta and I've been on it for 8 years since (ages 18 through 26.) It's the only reason I've been able to function and hold a job, so I'm very thankful for that. Like others noted, it creates a numbness to life combined with severe sexual dysfunction. I really can't afford to trade my well-being for a sex life though, so I'm fine abstaining and it doesn't bother me beyond some irritating remarks from others.
The few times I've tried to quit it, or had my refills relapse, I've felt intense and crushing thoughts. Crying all day, sucidal ideation, the works. It's extremely difficult for me to tell if this is how I would feel unmedicated, or if it's just the withdrawal symptoms exaggerating my emotions.
Like other anti-depressants, it will work for some people and it will not work for others. I really wish there was a better way to find ones that work rather than trial and error, especially when these test runs can take ~2 months to take effect. I would advise holding out a bit longer, but don't be afraid to switch to something else if it doesn't numb you out after a while (and like LogicalConclusion said, if it just makes you more suicidal, which is an awesome side-effect.)