I Have Been On Zoloft For The Last Two Years

I have been on Zoloft for the last two years and have recently just stopped taking it. I thought my inability to focus was due to my depression, but now that I'm no longer feel depressed, I'm wondering why I still have such an inability to focus. What could be the issue/ what are my possible options to fix this? I'm open to medication or any focus exercises, I just need some guidance.