What are those creamy little lumps that end up in your mouth and where do they come from? I don't often get them but did as a kid.

Can't tell. It is impossible to answer your question without seeing what you are questioning. There are numerous conditions that cause bumps in your mouth and without a photograph.
I have no idea. I have no idea what you are talking about. Can you give us more information or a better description as far as size, location, color? At least we would need to see a photo, if not actually in person. There are just too many possibilities.