Hello and welcome to the board,
You'll definitely find a lot of help here. I'll get this topic on the ball
First off it sounds like you have been taking some proactive steps with testing, all in which have tested in your favor, use that to ease your anxiety. Nobody in the world could tell you to stop feeling the way you do, because it's how you're wired... it's what makes you you.
Do you ever wonder if your anxiety itself is causing some of these symptoms? I know anxiety is thrown around as the reason for any problem, but I'm quite curious as to your worry is to what's trigger and/or possibly intensifying these symptoms that you're feeling. How old are you? Have you tried any other medications aside from Zoloft? I'm currently on Zoloft but I just started it about a month ago, so I haven't really gotten my dosage adjusted and I can't really speak on it's behalf, but since everyone is different, with these types of medications, it's not a one-pill-cure-all type of medication, it's a hit and miss... sorry to say, but stick with it.
It's good to be concerned, but it's not so good to overthink and overanalyze things... that will only cause you a headache.
I think cause the doctors have missed something.
ESPECIALLY because of all the tests that you take... they could find a trace of dope in your blood in units that you and I couldn't find even WITH a microscope.
Think of what they're paid... what they specialize in.... To let something go, especially if it is long-term and life threatening without any explanation, would result in MASSIVE repercussions... that is malpractice.
Never doubt a doctor... but never leave without an explanation. If these symptoms continue to press and make you uncomfortable, I urge you to see a doctor for a 2nd opinion. Tell him what's really
going on. and don't leave that examination room until you have some solid facts. you're paying them. You shouldn't be feeling these worries.
Best wishes to you, keep us updated.