I've had this mass growing in my uterus since July of last yr. Nt visible on any scan. Doctors think I'm crazy I need to know wht to keep looking for.

Not a mass. How do you know you have a mass if it doesn't show on any scan? I would guess that your uterus is enlarged without an obvious focal mass. An MRI or Ultrasound are great tools to see the uterus. If you have a mass in your uterus, both of these will show it. I am available for a second opinion.