It sounds like you were on too high a dose. When I was really bad with psychotic depression 5mg did me great. 5mg was powerful. After a few months I was able to go down to 2.5 mg. I came off it very slowly slicing the pills. Making a reduction every 10 days or so. Yes I always felt anxiety mostly around day 3 - 4 bad. Then lower anxiety for up to 3 weeks, then fine. I came off it in the end. I think most peeople need a much lower dose than prescribed.
But you were on it for a very short time.