Should I be experiencing pain at the port site 4 weeks post op?

I have had this ache on my side for three weeks. I originally found my port to the right of my belly button after surgery. I had no issues for the first week. Now I can feel my port right below my rib cage. I went to the ER and they said put ice on it and hopefully once the swelling goes down it will migrate back down. I'm still in pain. It feels like a constant side cramp that you get from running, except it feels like the port is rubbing again something. What should I do? Is this common?