I've never quit suddenly. I've always tapered.
I've been on various SSRIs over the years, but I stopped taking those after doing a little research. Many studies show that SSRIs don't fair any better than placebos in blind studies. Of course, there are people who swear they help them.

Maybe you should call your pdoc if you need help tapering. Maybe the doctor has a few free samples or something they could give you while you quit.
I hope you feel better soon.