@patty78
Was your pacemaker placed under your skin or muscle?

I had mine put under my chest muscle as my EP said I did not have enough skin in area and also because I was so active. It takes a long time for body to encapsulate the pacemaker. Once it does it forms an encapsulation around the pacemaker and wires.

I had my first ICD/Pacemaker in 2006. I am on my 3rd ICD/Pacemaker now. As I sit here if I focus on the area I can feel the slight pressure there. If I move my arms to far this way or that, or my left arm above my head it makes the area around my pacemaker irritated and I can feel it.

As you mentioned when you move a certain way it will be uncomfortable. What I do now is try to refrain from any movement that irritates the site and device. With that you can keep the irritation down and not irritate the area. If you constantly irritate the area around device with movements that you find does irritate it the area will stay irritated.

With now having my ICD/Pacemaker almost 20 years giving you my experience with this. It has been so long since my first one implanted but I remember it took a long time for me to feel comfortable with it and not have some pain and discomfort. Again takes time to encapsulate and time should help with your discomfort.

If the pain is substantial you need to see your EP. Do you have any swelling or redness in the skin above device? If so call your EP. From what you posted I can tell you that almost 20 years now of having one I have to limit my left arm movement or I will get discomfort. Sometimes I forget and feel it. But I do water aerobics and we move our arms everywhere. I have learned to not move my left arm in ways that irriates my device location.
Good luck and don't hesitate to contact your EP with your concerns and also guidance in how to reduce discomfort you are feeling.