You're not being stupid. You're genuinely concerned and you have every right to be. Sometimes our brains do things in our bodies that we can't figure out with a test of physical illness. Sounds like that may be the case for you?

I hope that in time you can trust your new doctor. I'm not a fan of doctors myself even though I have to see a lot of them! I hope the doctor can help you find a referral to a therapist too.