A sore or cyct in my mouth. Dangerous?

45 days ago, a bulb shaped bubble or cyct ( sory I dont know what to call it) grew on inside of my lower lip (left side). i thought it was jus a regular mouth ulcer, but later noticed it was completely painless. its size was growing daily and after reaching a limit like size of a peanut, it popped up itself n a very gummy liquid came out of it. even after popping it was painless. since it all drained the liquid itself, I thoutht it wud heal in 1 or 2 days. it went as I expected. it seemed it was healing but again after 3 days it slowly started growing in size again by accumulating that gummy liquid inside it. now it bacame like a cycle. grow and pop. I searched on internet for it and people said it is called mucocele retention cyct. ( not sure if this is the same cyct or not but the symtoms are matching) it's been 45 days now.. still it is not healing. how to get rid of this?? is it dangerous? is it mucocele cyct or anything dangerous?? please help. this is causing me too much trouble