Vagina Mystery?

Hello, girls. I have been dealing with an issue since early December and I have not been able to find any answers. In early December, I experienced symptoms like burning during urination, urgency to go, constant burning. I went to doctors and they did a urinalysis. I had no bacteria, but I had blood in my urine. They prescribed me antibiotics. They did not help. I went back to the doctors they sent me to get bloodwork and other tests. I had no bacteria in my urine and I had no STIs or STDs. It is February and I am still experiencing symptoms that will fluctuate. Amost unbearable burning/pain, pain when urinating, and light discharge. I have been drinking copious amounts of water because that seems to be the only thing to help. Any ideas of what you think could be going on?