I'm having extreme throbbing pain after getting a crown.

It is very common for a tooth receiving crown treatment to be sensitive and also common for gums to be irritated from the procedure.  If you are wearing a temporary crown, it is common to have pain when biting down.  You should visit with your dentist to determine if the pain you are having may require further treatment such as a root canal to stop the pain.

I'm sorry to hear that you're in so much agony.  I would definitely call the doctor you saw immediately.  It is normal to have some pain after crown preparation procedures but intense throbbing is not.  Potential issues might be:
1. The temporary crown is too high.  If this is the case, a new temporary or an adjustment to the current one can help solve this issue.
2. Open margins on the temporary.  If the temporary wasn't made properly, and it doesn't seat completely down all the way, a patient might feel similar symptoms.
3. Nerve irritation.  If the nerve is incredibly inflamed and irreversible (this can be determined by your dentist) then root canal therapy can solve the problem and alleviate the pain.

THE MOST IMPORTANT THING:  DO NOT cement the final crown until the pain gets resolved!

Thank you for your question. I am sorry you are experiencing pain and can not eat. The best thing to do is to call the doctor, who placed the crown. He is familiar with your case. It sounds like the nerves in the tooth and/or around it are inflamed.He may recommend to adjust your crown. If that does not help, taking antibiotics afterwards might help. The is also a possibility of a root canal therapy based on your description, but your treating doctor would have a complete information to make an appropriate decision and recommendation.

Sounds like an infected tooth to me. Could be from a lot of things -- dead or infected tooth pulp, gum infection from debris left from crown procedure or deep periodontal pocket.  Get to the dentist.

It sounds like you had the tooth prepared for a crown and have a temporary on??  When we do a crown or filling, we cut into the tooth which is a part of the body. So it is just like surgery...the body is going to react and you often will have some pain  or discomfort for a few days.Warm salt water rinses can help calm the gums down; Ibuprofen or Alleve can help with the throbbing. If it is not better in another day, I would go back and see the dentist. It sounds like the temp may well have a high bite which can cause the tooth to remain sensitive and hurt to chew on. This can be adjusted and the tooth should be better each day. Some cold sensitivity is normal.