Depression or something more serious?

So, as far back as I can remember I have over worried about pretty much everything in my life. From big things to rather small subtle things that normal people would not think twice about (always filling up my gas to full tank so i wont run out) Over the past few months I have had a few random physical symptoms on and off. Stomach and abdominal pains, sometimes blurry visions, aches and shooting short pains all over      my body and on and off back pain and chest pain, just to name a few. I feel like every week I am at the doctors or the hospital for a new random symptom that I get. I have a part time job and am currently seeking a full time one but am afraid to because I feel chronically ill. I can't concentrate on things I used to love and all I do us google different symptoms to try and figure out what the heck is wrong with me! I wan't to go get a full body MRI done just to get some peace of mind but I don't want to sound like a crazy person...does anyone out there have similar symptoms at all? I need someone out there to reach out, because frankly I feel really alone and need some guidance and help...anyone out there like me?