Built-In Output has disappeared?

I was using my mac today. Just playing MineCraft. I left to eat dinner with my family and after that i went gaming on another PC. When I returned to the mac 4 hours later he was still running. So I quit all applications but did not shut down. I set the screen into sleep mode using an active screen corner and went doing something else.
I came back like 1 minute later and the mac was shutdown. I started it and while it was booting i disconnected my external speakers, USB Hub, ThunderBold-DVI Display and the charger and left only one external Hard Drive connected.
Once it was booted I logged in and tried to listen to some music. This was not possible because I could not hear anything. I went into SystemPreferences/Audio/Output and the option for Built-In Output was gone. The only options where Digital out, SoundFlower 32bit and SoundFlower 64bit. (For the record: SoundFlower is a utility software which I use for recording the system sound for my videos.) I could not change the volume and  Couldn't hear anything through my recordings in SoundFlower. So I rebooted. I heard the duuun sound at the startup so I knew the output was working correctly but once again when I logged in I couldn't hear anything.
Nothing is working. I can't get it to work through System Preferences nor Audio MIDI Setup. If I connect my earphones the output changes the Headphones and that works but when I disconnect it my mac becomes terribly slow for like a minute and Audio MIDI Setup crashes and the output changes to Digital Out. There is no red laser light in the plug on the left of my mac so I am out of ideas of what might cause this issue.
Any leads?

Start out with these ! Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support How to Reset NVRAM on your Mac - Apple Support if issue still persists look inside the audio jack see if the light is on.

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