Tooth Extraction infection??? Hurts A lot...

2-3 days ago I had my bottom back molar extracted due to it being a dead tooth and I'm experiencing a lot of pain my cheek is swollen and I can barely eat to even take an Ibuprofen Pill. I'm worried I may have an infection in my socket. It's like a dark brown color and whiteness on my gums where the tooth was extracted. The dentist Didn't give me anything he just did the Extraction and that was it. I also have a bad taste in my mouth. Is this normal? Or should I be worried? 

I think you really need some antibiotics.

Go back to your Dentist. 

Good luck and hope you’ll soon be back to normal