(I am going to ring for a dental appointment tomorrow).
Sitting on the bed earlier while I was reading I was rubbing my finger along the gum on the top of my mouth (no idea why but there you go...). I felt what is a very hard very small lump above my pointy front tooth on the outside of the gum above the tooth. I immediately thought abscess and looked in the mirror but it isn't red or sore at all. It looks like part of the gum, if you press on it it goes white like bone. It feels like bone! But it is definitely a little tiny lump, like a very small pea. I've no idea how long it's been there, it's purely by accident I found it. I don't have the same on the other side.
Any ideas?
I tried taking a photo and it won't show up. I have quite bad health anxiety anyway so I'm in a panic thinking it's mouth cancer... 

I'm 36, non smoker, teetotal, healthy weight if that makes any difference....!