Unactivated MMS and Dark Urine

I have been adding unactivated MMS into my two litres of daily water intake. I started with 1 drop and worked my way up to 7 drops (I use a syringe to measure, and I believe 7 drops is less than 0.3ml). I have noticed that my urine has been dark, amber to dark amber in colour. I stopped after about ten days because I started experiencing headaches. It has been a couple of days since I stopped, but my urine is still dark. Should I be concerned about this? Any advice would be appreciated.

I will send your post to Scott McRae who wrote Protocol-1 which uses unactivated MMS drops. 

Using the international standard of 20 drops per 1 ml of solution, each drop would be 0.05 ml. 

So, 7 drops would be 0.35 ml.