SEVERE UTI-like symptoms for 2 yrs. Gyno: UTIs, STDs, STIs, & infections test neg. A lot of blood in urine. Urologist said everything is normal. How?!

Seek a second input. Hematuria is not normal. Your symptoms suggest the probability of a stone and or passing a stone. Would suggest getting an imaging if not done. Further more a full urine test would help. A bladder stone can cause UTI like symptoms. In rare cases interstitial cystitis can present like this but rare. Getting a kidney doctor to work up is the next best step. Best of luck hope you feel better.
Uti. If this has been going on for two years perhaps it is time to seek a second opinion from another urologist?