Yes, depression is not uncommon post bariatric surgery. Medication may be the way to go, at least temporarily.
I have had clinical depression for at least four decades and have been taking bupropion (Wellbutrin), an NDRI, for 20 years. I have no side effects. SSRIs an SNRIs did not work for me or only worked briefly.
It's important for you to work with a psychiatrist for medication. They know far more about psychotropic meds than primary care physicians. Please bear in mind that there is no one-size-fits-all psychotropic medication. To find the antidepressant that works for you is a trial and error process. It may take numerous trials. Hang in there, it does get better.