I peed a blood clot, and it feels like i need to pee. i had a upj obstruction at 3 months old and 10 months old. what does this mean?

Blood clot in urine: Having obstruction in the urinary tract can cause urinary residual that can lead to crystal deposits, stone formation, bleeding & urinary tract infections. You need to see your 1ry care physician ASAP to get a referral to a urologist, you will need routine U/A, urine culture, blood work for renal functions, electrolyts, voiding cystourethrogram to look for obstructions or vesicouretral reflux.