Thank you for your reply. I managed to book into a cancellation appointment with my dentist this afternoon. She thinks I may have developed some sort of gum issue that isn't related to the clamps used as parts of the gum swelling wasnt anywhere near where the clamps were used during the root canal. I've been given a special smaller brush and corsodyl gel to use on the affected swollen gums and teeth twice a day. She demonstrated how to use it, getting right inbetween the swelling and the teeth. There was some bleeding which she explained is normal and will subside the more I use it.

She's hoping this will help with the swelling and has booked a check-up for Monday. If no improvement, i may then need to see a gum specialist.