I just did a google and this is what I found --
What are symptoms of EMF sensitivity?
The symptoms most commonly experienced include dermatological symptoms (redness, tingling, and burning sensations) as well as neurasthenic and vegetative symptoms (fatigue, tiredness, concentration difficulties, dizziness, nausea, heart palpitation, and digestive disturbances).
I did not have POTS, but I sure had head pressure, ear pressure and lymph node swelling. I had lyme. Treating lyme and those went away. But they did not go away over night. It took months before the head pain or pressure went away. The ears feeling plugged, or whatever they were, went away 1st out of all of them. For the lymph nodes I did red root and lymph massage as shown by Heather on YouTube.
I often felt that I had more than just the 4 letter word lyme. It was incredulous to think that a tiny little critter could wreck such havoc in my body.
That is reassuring that treating only lyme is the right thing i'm doing right now, but to answer any of your question.
1. I don't seem to have redness, tingling or burning.
2. I have fatigue, tiredness, concentration difficulties, dizzines, slight nausea, heart palpitation and slight digestive disturbances, which all are connected to lyme either way.
3. I have head pressure and when i stand from sitting, not always, but sometimes, i get light headed and my vision darkens for seconds, after which i get back to pre standing, but with a little fog in my brain anyway.
4. I'm 22, but i feel like i'm 80. Is this also how lyme feels? Well, i wish i only have lyme, bcuz that means i won't pay as much as i need.