It is normal to have pain; this should be controlled with over-the-counter paracetamol. Do not take Aspirin or Disprin.
It is important to keep the mouth clean following an extraction. Tooth brushing can commence the following day, being careful around the extraction site. Starting the day AFTER your extraction: Dissolve a few teaspoons of salt in some warm water and rinse gently, to keep the socket free from food and debris