I'm really nervous

I went to my first seminar appt. last month (Sept. 30). I am scheduled for my second visit on November 2nd. Since then, people have been trying to discourage me from getting the procedure. One co-worker kept saying how the body works to reject foreign objects and a family friend has had the gastric-bypass (with at least 5 trips back to the ER) advised me to consider the Gastric Sleeve for best results with a long lasting effect....which seems way too evasive for me. Anyone know of success stories of 5 yrs. plus?