Hi Gemma I am sorry to read about your condition and symptoms. Sertraline is generally safe and effective in addressing depression and mood disorders by increasing serotonin levels in the brain. When taken alone at prescribed therapeutic doses, the risk of serotonin syndrome is low and uncommon unless there are other underlying conditions related to genetics or hormonal imbalance causing excessive serotonin levels in the brain. However, combining sertraline with other medications or substances that also boost serotonin levels, such as other antidepressants, migraine medications, recreational drugs, or herbal supplements like St. John's Wort or 5-HTP in high doses, can increase the likelihood of serotonin syndrome. It will be great to discuss your symptoms and medication regimen with your GP or a psychiatrist, who can assess your situation and adjust your medication doses accordingly to manage symptoms effectively and safely. I wish you the best.