Hi Everyone, I am new to the site but am in need of some help. I have been feeling sick lately. I have had nausea for the last three days, feeling lightheaded (like I can't think straight), my left side of my abdomen has hurt, and I have been tired all day every day for the last three days. I try to go to sleep but I can't sleep. I'm not really sure what is going on or even what it could be. I am looking for advice as to what it could be or if I should call my doctor. Thank you!