Two months off Sertraline

Two months after stopping Sertraline (I was on just 50mg for only 8 weeks) I am still suffering from:

*heightened anxiety especially in the morning
*awful diarrhoea
*tummy aches
*bloating
*nausea / lack of appetite

Had a colonoscopy last weekend which was clear aside from a single uninflamed diverticulum.

My question is:
*Has anyone else had the same protracted withdrawal problems?
*If so, how did you combat them?
*Has anyone got diverticula and would this be enough to account for my symptoms and it be nothing to do with the sertraline?

Thanks
Pete