13 yr old got a mucocele?

Or lump in my mouth? It looks like some pictures ive seen but its not a different colour to my lip the exact same reddish pinkish colour.. Im 13 and always govereact about these things like when i do a google search and see the word 'cancer' i get all scared.... SO im gonna see a doctor soon but any idea if its a mucocele? Just a fairly large lump (size of a pea) on my lower lip and its the same colour aswell no yellow spots or owt. It only appeared today after i think i came home from school and i didn't bump my mouth or bite my lip i dont think. Oh yh and i dunno why but after swimming it just seemed to magically get larger :(. Btw nice site to the guy who made it but on the announcement at the bottom of the page why did u put 'Mucocele SURVIVORS'? crap that scared me...