Welcome to the forums. you shouldn't google your symptoms, it can turn something as simple as palpitations into heart disease. Here's something thats helped me, when i googled ( you really shouldn't) before anything,right down on a piece of paper the symptoms you currently have when your panicked or worried ( and dont try and think of other symptoms you might have) then right down what the symptoms of the health problem you think you have are, if you don't have 90% or more of those symptoms then you don't have it. for example if your worried about brain tumor and you only have nausea, headaches and forgetfulness chances are high you dont have what you think you have, but i know from experience when googling your symptoms and you see, lets say, kidney disease and a symptom is weakness your suddenly like " i have kinda been feeling weak". i also know what you mean about the simply things making you worry, i feel sick and i automatically think i'm dying or i think i have swelling when i don't and i think kidney disease.