Surgery in a week & few days

For about 3 years ive felt so much pain in my abdominal have went to my doctors, have been to the er for it. Never been diagnosed with anything major rather then ( i probably ate something wrong, or it can be stress etc.. ) never nothing abnormal!! A month ago i woke up to severe pain in my abdominal area nauseas and I decided to go once again to the hospital and they detected serveral gallstones and will be getting surgery in a week and some days!!! IM SO NERVOUS