Extreme pain under center of abdomen under ribs. so severer it causes nausea,vomiting,dizziness and shortness of breath. and severe sweats. ?

Epigastric pain: Most likely gastritis and or H pylori ( a bacterial causing gastritis) or gallbladder orrarely if acute a pulmonary embolism especially if smoking and on BCP or asthma/ bronchitis/ penumonia. Seek medical attention immediately in ER if there is shortness of breath

Go to emergency: This sounds serious. I suggest that you go to the Emergency Department immediately for diagnosis and treatment.