Is it normal to see an oncologist for complex cyst?

Hi everyone, 

After a routine ultrasound scan I have been diagnosed with a 9cm complex cyst. 
I first had a call from a specialist nurse who arranged for me to have blood tests, mri and ct scan. My ca-125 came back elevated at 240 and my mdt meeting has said they are unsure what the cyst/mass is, just that it could be cancerous. 
I now have a meeting next Wednesday with an gynaecologist oncologist and absolutely worried sick I have cancer. 

has anyone else been through this before?