Lights flickering and clicking noise
My house was built in 1886 and I know it has some knob and tube still. But for the last week maybe I keep hearing a loud click and all of the lights in my house will flicker. I just turned everything off tonight other than a lamp to see what would happen and it’s STILL clicking in the other room even without the flickering since it’s off. Should I call an electrician for this or is it urgent ? I swore I just smelled a slight smoke smell for a second when it did it once tonight as well so I’m a bit nervous.