... I have for something completely unrelated, and didn't discover this until I went to start taking this other medicine. I've been back on it for 3 days now, but still feel low, and having trouble concentrating. I'm also currently feeling a bit ill today, and can't tell if it's allergies, an illness, or still from having missed so many days with my antidepressants. How long could it take for me to get back to "normal"?