What a ride @Pommy8. No wonder you are scared and annoyed. Anyone would be feeling that way. It is extraordinary all that chopping and changing. No wonder you don't know who to believe.
What is the next step, ultrasound and biopsy? When? If it was me I would insist to have certainty. I would also be asking that oncologist to review all your history or even get another opinion maybe.
What can you do to keep busy? What works best for you when you are stressed? Have you got some good people around to support you?
Sending a really big hug to you 💐