My left ear keeps ringing?

Starting last night my left ear randomly kept ringing. Idk what caused it, all I was doing was coming home from school. Today it's been ringing on and off but mostly at night it tends to be at its loudest. My ear doesn't hurt but it feels somewhat stuffy and the ringing can't be quite annoying when I'm trying to sleep. My mom thinks it's been from listening to a lot of music over time through my headphones is finally catching up to me. But I've never blasted music in my ears I always had the volume at a decent level. Any others explanations would be great as I am stumped like a tree atm, thanks!