I am a sixteen year old female and I am going to start taking Zoloft for social anxiety disorder. Im afraid of a few side effects such as nausea, but mostly weight gain. I am already small for my age and I run cross country which is at least three to five miles every day. Do you think I will still gain weight this way since I think gaining is a side effect? I already have issues with self image and confidence due to my SAD and weight gain would not help. Please let me know your thoughts.