Last year after having wisdom tooth extracted a lump developed on the roof of my mouth as well as a small cyst on the side of my gum (not actually near where my wisdom tooth was) but I never really took much notice of it as it didn't cause me any pain or discomfort

Over the weekend I began getting a bad smelling / tasting odour in my mouth which I believe is from the lump on the roof my mouth. I have popped the cyst on a few occasions but it keeps comming back

I plan on getting it checked out this week however I need to know if this sounds like something serious, possible oral cancer etc.