Bulging Lump under chin

Registration date
Tuesday November 17, 2020
Last seen
November 17, 2020
So I have a lump under my chin that I dicovered about 3 weeks ago. It bulges out if I swallow or press my tongue to the top of my mouth. Otherwise you can’t see it.
I made an appointment with my dentist to follow up with just incase it’s an issue with the root canal I did back in April. Should I be making an appointment with an ENT as well? I’m nervous. It’s not painful and I can feel lymph nodes around it. Has anyone seen anything like this?