I had a root canal done in an upper molar a couple of years ago - well
after eating a meal at the weekend when I woke the next morning it felt
as if some food had managed to get underneight it - the gum either side
was swollen too.

Well obviously it is one I can't floss as the filing covers it. So I
kept kind of sucking it to get the food out all day long. Later in the
evening I had a splitting headache and the feeling as if the tooth was
aching. Right now it feels less painful a day or so later but still
feels like there is pressure under the tooth. Is there a chance that it
will go or will i have to go to the dentist to get it checked out.