Bumps inside vagina

So yesterday my SO was fingering me when he said 'babe, what are these spots inside you? There was one last time now there's a few'. I thought maybe he could feel my g spot because that's a different feel to the rest of the walls or something but when I felt them it was just above that. On a bit that is usually smooth, there was small spot kind of bumps. They were never there before so that's kind of freaked me out a bit. Has anyone heard of this before?