As others have said, ask your doctor, but also 5mg/day is a really low dose… 20mg/day is around the bottom of the usual dosage range; your doctor may just tell you to cut your pill in half for a few weeks to a month and then discontinue, and at that dosage you may have no noticeable change at all.
Whenever I’ve come off SSRIs the there have been no withdrawal symptoms, but that’s always been with very slow reduction of dosage over 1-2 months. The one time I came off without a doctor I doubled that reduction time, just to be safe.
In my experience it’s not mood changes or obvious withdrawal symptoms to look out for, it’s side effects you’ve gotten used to going away (dry mouth, sexual issues, appetite changes).