Sounds to me like your lymph is full and could use some help. Either that or your digestion is continuing to create new toxins daily.
As for the SP you can use it more than 2 hours a day, for me some days (early on) 4-6 hours where needed. The only issue you run into is that it may plug your liver so you need to ozonate and/or do coffee enemas.
How much Colloidal Silver are you taking, may want to step that up to help your lymph stop breeding more bacteria.
As for north vs. south, stay with the north facing IMO...