Pain above belly button right side lower back nausea stomach feel swollen?

Doctor can evaluate. In that area are the liver, gall bladder, part of the stomach, small intestine, etc... If symptoms are bothersome, recurrent, or unusual, a primary care doctor can evaluate and do an exam to help get a diagnosis. Sometimes it is a common stomach flu starting up, but it can also be other medical disorders... So, a doctor's exam may be important to do.
And pain. Pain above belly button on right side is often caised by gallbladder problems. Particularly if pain is related to eating. You need to be examined bu your dr and get appropriate imaging studies to find the cause.