Lump on jaw

Hi let me start again I am a single mum of two teenagers who drive me mad all the time, I am 47 yrs old and work in a care home as a tolley dolly. I have had a good life but lately I had a bluster in my mouth so went to the pharmacist they told me it was a abess and gave me something. After 6 weeks it hasn't gone away so I started to get a lump on my jaw. I phoned 111 n got a out of hrs appointment, they told me it was a saliva stone block. Went to the drs on Tuesday and now I am being fast tracked for cancer. I am a little bit stressed worried n scared. I just need some advice n friends to help me xxx