Bony Lump on jaw bone growing


Lump on Jaw bone it is hard unmovable and growing. Can't feel anything from inside the mouth but it is becoming more and more visible. 
Have been to the GP who referred me to the hospital. Had a CT scan and ultrasound, it is too hard (physically)  to take a sample of using a needle. Awaiting appointment that's not for 3weeks 

Anyone have any idea what this is ? It is in the Submandibular gland area