Depression Support Group
Depression is a real and debilitating condition that is often misunderstood by family and friends. Its meaning can range from a prolonged period of sadness to an actual mental illness with specific symptoms. Find and share experiences with others who are going through the same struggles.
Since this is all part of the digestive process, it is possible diarrhea is a side effect of cholecystectomy (gall bladder removal). This should be confirmed by your DOCTOR however.
"A minority of the population, from 5% to 40%, develop a condition called postcholecystectomy syndrome, or PCS.[9] Symptoms can include gastrointestinal distress and persistent pain in the upper right abdomen.
As many as 20% of patients develop chronic diarrhea. The cause is unclear, but is presumed to involve the disturbance to the bile system. Most cases clear up within weeks or a few months, though in rare cases the condition may last for many years. It can be controlled with medication such as cholestyramine."
https://en.wikipedia.org/wiki/Cholecystectomy
That SSRIs are part of the condition is highly questionable ... and this should also be asked of your doctor.
Hugs