Thanks for your response. When this first started I took salt water but stopped it when my blood pressure went up several weeks ago. I restarted salt water just over a week ago and the fatigue days I was getting have been replaced by anxiety days, but at least I have my energy levels back, that's why I thought it might be latent bromine that had got stuck due to no salt. Since starting salt again I feel my kidneys are processing something, an anxiety feeling is usually followed by kidney ache and then I notice the urine has a distinct smell to it and I have also had a armpit smell similiar. It coincides with my lymph nodes swelling and pumping in my neck. The 3 day cycle seems to be linked to how much energy I use, it's not diet related. In general I feel better than I have been, but it all seems to be linked to what is going on in my throat/lymph nodes - they feel full sometimes just underneath my chin.