My crown feels a lot of pressure and throbbing. Gum is swollen. Should my dentist remove the crown and look under it?

I had a deep dental cleaning 5 weeks ago and have visited the dentist twice with this problem and they don’t see anything wrong, even with X rays. The gum was giving me problems before going in but they said after removing plaque, that it should go down in a week. The crown is 10 years old and isn’t loose, but it causes me pain daily at this point. It’s had a root canal and I floss it every night & Last night I noticed bleeding. Do they need to remove the crown and look under it? I’m at a loss.