Post c section 2 weeks ago. Have had severe upper back pain turns to upper abdominal pain then vomit. Feel fine after and before episode.?

C section psin. I am not entirely certain what is causing your symptoms but one possibility is that your intestines are not reaction well to recent surgery and are occasionally getting blocked. I would call your Ob Gyn tomorrow to ask, or go to the ER tonight if you develop severe stomach cramps or nausea. Feel better soon!