Thanks Nate for the advice. I consume 5-6 liters of fluid on daily basis. Min 3 liters of water, 2 cups of coffee, 4 cups of tea. But about salt, yea I love salt. I have to reduce the amount I consume, I suppose. Gonna work on it. Also, I - at least - doubled the consumption of dairies since I became vegetarian (13 months have passed since I became one) to make up the amount of protein I need. Maybe that contributed as well.
I took appointments for urology and MRI for next Monday. Gonna get a clear picture I hope.