Lump in neck

Hi, just looking for some advice/reassurance. I've had a lump in my neck just under my jaw line below my ear for 5 weeks. I've seen the doctor, had blood tests and I'm having a ultrasound on Friday. The lump is around 5cm in size, it isn't painful either. I first thought swollen gland but I haven't been unwell? I'm getting more worried now that it might be cancer after Googling. I'm 28 female, mum of 2. Has anyone had something similar and turned out to be normal? Thanks