What happened to all of the sounds in my phone.

I was browsing YouTube having a hard time getting songs to play so I switched to another music app where I was able to get some songs to play & suddenly I lost all sounds. I was connected to bluetooth but not using the mp3. I was using earbuds at the time. I checked all the volume levels plugged & unplugged buds turned phone off & on 2 times. Please help me thank u