Swollen gums & bleeding gums after veneers

Hello folks, It’s been 8 months since I got veneers but the gums are extremely swollen around the veneers. I also have bleeding gums whenever I floss and randomly. Also I had issues since I got veneers. One of the canine kept popping off every 2 months and I have extreme sensitivity to hot and cold drinks.

Not sure why my gums are swollen and bleeding. Anyone has experienced this? I am scared as I don’t want to lose my teeth out with periodontal or gum disease.