Cut off drinking about three weeks ago, but recently things have been getting progressively awful. Every night I only am able to sleep three hours, and sweating so terrible I have to change sheets. I similarly have nightmares where I die every single time. My hands, arms, legs, limbs* have have either been shaking uncontrollably or have gone numb. That said happened at work where I was almost ready to black out. I also taste blood, like half the time.

Is this liver failure? My best friends girlfriend said it might be anxiety due to stress, but I can't afford to see a doctor.

Those are pretty non-specific symptoms. The most concerning are the shakes and night sweats. I would go in, were I you

Try to visit a doctor and/or to have someone reliable by your side if possible. Try to not stress out yourself. Sitting on a bench near your house and breathing fresh air can be useful too. Do deep breathes.