So, this is good mindful self-awareness you noting location in body, and pain level.
That sounds very likely to be the mechanism. A few comments:
1) I remember when I was very young, complaining to my mother about my legs, she told me that the entire family experiences leg pain before and during an incoming change in weather that is cold, damp, or includes thunder/lightning...
2) Lately, I've found myself observing the effects of simply resting my digital devices on my torso. This is going to sound crazy, which is why i've not shared it. But, every time I do, I experience discomfort in that localized region. It feels like things are being crunched, inflamed, and begin to feel like a strange, subtle burning. It's like the cells of that region are eating themselves. That's the most often way I explain it.
I've just recalled that digital devices emit electromagnetic radiation--although it appears to be "non-ionizing" radiation. It's worth mentioning research into cell phones causing cancer. None of this am I sufficiently informed about. But, i can certainly report my experiences.
Additional Note: I know nothing of HAARP other than the name, and it has something to do with the ionosphere and manipulation. But it's come to mind as I wrote this.
Since you mentioned that you noticed EMF seems to effect your health, then you might try some experiments to see if shielding and/or grounding reduce the frequency or intensity of your health issues.
I'm unsure if I could accomplish that while living in a room of an apartment on the second level of the complex. It seems my option would then have to be a suit of some kind, but I'm not sure how practical that is for me at the moment given my situation.
I've not recorded my pain and discomfort log these last few days because pain hasn't been too bad. It's rather consistent with expectations.
All pain and discomfort in areas previously mentioned has reduced to 5 or less, with the exception of stomach, neck and shoulders at 6. It's worth mentioning that I've had several, ongoing dhamma discussions over the last few days with eager local aspirants.
I've found the Energy from these discussions relieves discomfort, improves drive, and improves ability across the board of all body, mind, spirit, and consciousness faculties. I'm carefully recording and detailing how this works.