Hi,Lilacluv! So sorry you are having to go through this. Believe me, I've been there. I had hallucinations--both visual and auditory--on Prednisone. I also felt paranoid and couldn't sleep. That ended up with me finally going to an ER after 3 days. I had only taken 2 caps of Prednisone, that had been prescribed for my stepdad. Don't know the dose, but I have never taken Prednisone again and never will.
Try not to get yourself in a state of panic. The ultrasound should tell the story. If it is clear, you might want to ask for an MRI to make double-sure. I'd been having ultrasounds once a year since '93, when my hep C was diagnosed. The last one showed a very large tumor, which proved to be cancerous. I had some treatment and surgery, and am okay for now. I get scanned frequently now.
Praying that you have good results.