Persistent pain in chemo port - any tips?

So I've had my chemo port since early November 2024. Over time, I have noticed that a lot of things cause serious pain around my port site, like a really strong throbbing cramp feeling that goes into my shoulder, neck and chest on the side of the port. It's been worse over the past couple months. I talked to my oncologist about it and he said it can happen, and so long as there aren't signs of infection or clotting beyond the pain (which there aren't), I'm not at risk. But I'm not okay with that! It's really limiting my mobility.

It's especially bad when I wear any type of bra, because the strap sits right on top of the site of the port, which seems to trigger the pain every single time. But I'm not exactly flat chested and going braless in summer isn't really my preference (I got away with it more easily in winter). Backpacks are also a no-go now, which is very inconvenient.

I'm done with chemo now (about 5 weeks out, yay!) but I have two more years of immunotherapy ahead and it would benefit me to have a port for that process. However, being in pain so often is just making my recovery from chemo a lot less smooth than it could have been.

Any advice would be much appreciated.