Hi all, so, now I know - places on head are C3 and C4 - anode left, cathode right side.
I do tDCS again now, for 5 days, but without success. :-/ It's very disappointing but i will continue.
So, I will definitely keep trying, but now the thought comes into play if my improvement was really due to sleep deprivation! As if it changed something in the brain and it started to function normally and stopped sending faulty signals about pain and inflammation to the body - it really felt like that 2 months ago. But first days with 1-2 hours of sleep was hell.
@Garz Tramadol helped me to overcome the massive pain and burning sensations when I was extremely sleep deprived, it worked really well, but the effect of tramadol was gone the very next day after I stopped it - so it wasn't behind the overall improvement.
If i try sleep deprivation again I'm wondering how to do it right... But if it works it will be worth it! Those more than two months have been so amazing!