Swelling of gums two weeks after silver crown. Is this normal?

I chipped a molar tooth (#19, bottom left side) a few months back, got a root canal about 5 weeks ago (favorable prognosis) with an endodontist since my dentist doesn’t perform them on molars. And the more “permanent” crown was done by my dentist 2 weeks ago. There was swelling initially but went down. But the last few days it’s been sore and gums are swollen. Is this normal or could something more serious be going on? I have a follow up in two more months but nervous to wait?