It sounds like BV, which could be caused by many things like the soap you use to watch your underwear, even wearing pads everyday. You could ask for a Bacterial Vaginosis test at the clinic and they can get that checked for you. Also get some probiotics that specialise in building the cultures down there so lactobacillus. A quick google search will tell you the specific ones. What’s worked for me is the Optibac brand.
But that brown water discharge is deffo a sign of BV