Been on it for about 6 months, hard switching at first from zoloft, only 2nd one I'm on. Helped lowering chronic pain by 2 points or so, not sure how well it works, since I have problems identifying my mood until I'm well under water, and the I think I'm still treading on top. I was going to try a different one, but life interfered, I had too much going on to add something else to the mix. Also freaking covid and 2020 makes it hard for me to judge. Id say it's been about 4 months since I felt I was under/treading water.
It's been my most effective antidepressant and I have been on it for about three years. It also helps with tendon, bone pain, anxiety ... for me a perfect fit. I hope you get some relief too, give it time because I think it takes some to discover how it works with your system.
Cymbalta was my first antidepressant, and it worked extremely well for me. Some side effects, but for me they were tolerable. It was the foundation of my medications until around 4-ish years into it....and then it seemed to stop working. Turns out, that's the thing with Cymbalta - you will become too used to it, after a while. Loses efficacy. But - that 'awhile' is typically after 3-5 years.