Low sodium blood levels and drinking too much

We are told to drink plenty of water or juice in order to keep ourselves hydrated. It also helps to prevent urine infections or stones from forming in the kidneys. But how many people suffer from low sodium because they drink too much? My sodium levels are always under par. The UK bottom limit for sodium is 133. Mine are always around 128. They are rarely within range. I drink approximately 2 ½ to 3 litres of fluids a day. The more I drink the less sodium my body is able to retain — the fluids simply flush the electrolytes from my body. I now take a 600 mg sodium tablet every day. Even then my sodium levels are still at the bottom end of the scale if not lower. Once, when I was drinking more than 3 litres my sodium levels plummeted to 116. I was rushed to hospital not knowing who I was or what I was doing. I thought I had six arms. I couldn’t string a single sentence together coherently. As soon as I started talking I forgot what I was talking about. In fact I was talking utter nonsense. My mind was garbled. As soon as my sodium results were ascertained by doctors in the A&E department, I was put on a sodium drip. It saved my life. When sodium dips too low one’s brain begins to swell. It can cause death. The disorientation soon vanished after I had had the intravenous sodium. Following that I was put on a low fluid intake diet for a week. For the first couple of days I was allowed 1 litre. The next couple of days I was allowed a litre and ½. After a week I was drinking two litres. Now I am very careful not to overdo it. Drinking large amounts of water can become habitual. I’m writing this to let others know that drinking too much can cause more harm than good. My sodium levels are checked every month. In fact I had my bloods done today and I will know tomorrow what my sodium levels are. After my extremely low-sodium experience, I am always cautious. It worries me sometimes when I see people drinking four litres or more. They think they are doing themselves the world of good, just like I thought drinking excessively was doing me good. Anyway, thought I’d mention it. It might just save somebody from a near death experience, such as the one I had. Incidentally, I pour salt on everything — even my cereal. People look on horrified as I tip the salt cellar up and let the salt pour out. "You will have a heart attack," they say, adding: "don't you know that salt is bad for your blood pressure?" I tell them my blood pressure is 55/38 in the morning and I'm lucky if the systolic rises above a hundred during the day. They look at me in disbelief.  I continue pouring the salt, totally unfazed by their comments, and knowing that it is doing me more good than harm. There is nothing wrong with my heart but there could be plenty wrong with my brain if I let my sodium levels drop too much.