What could this be? i have pain right side of my chest for 3 days.... woke up and there is swelling on the right side of my chest now.... tired too

Possibly Tietze synd: If anterior chest could be costochondritis,inflammation of anterior rib cartilages.When pain is accompanied by swelling, referred to as Tietze syndrome.Costochondritis itreatment Sometimes pain resolves without treatment. Cause is usually unknown. Costochondritis affects females more often.Tietze may require steroid inj.,ice, analgesic patch,avoiding aggravating activities.See DR for confirmation