I know my shoulder & chest area are tight also, but my implant was only a month ago, so they said it will go away with time [crosses fingers] I feel pulling & tugging inside where the leads are every time I move my arm but some others I've talked to don't feel that.
Do you have another checkup with your dr? I would schedule an appt if they said it would go down by now and it hasn't, just to make sure.
I know I have seen similar posts in the past. I reply here just to push your post back to the top in the hope someone can help.
I do recall reading that some people take a long time to adjust to the insertion of a PM. People I know who have them do not have any of the problems you describe, but I don't know how long it took them to adjust.
I think there will always be a slight sensitivity at the location of the device. I write with no personal knowledge, I do not wear a PM... yet.