After having my hysterectomy 4wks ago my stomach is sore and sensitive is this normal?

Yes : You are still healing & it's normal to feel sore as you do more activities. Take Ibuprofen with or without tylenol (acetaminophen) for the discomfort. You can substitute naprosyn (aleve) instead of the Ibuprofen if you prefer. By 6 weeks you should feel more normal & get clearance from your surgeon before returning to all normal activities. Take care of yourself & give it a little more time.