I am a healthy overweight 35 year old male,whose father

I am a healthy overweight 35 year old male,whose father passed away of bladder cancer at 67 and who has only one healthy kidney from birth. I was found to have very very few sperm if any on testing. Three months ago I had burning while urinating and pain and experienced gross hematuria. Went to the ER blood in urine a a level 3, wbc, wbc in blood over 17,000, stone CT w/o contrast negative. Bacteria cultured in urine over 100,000. Next day went to urologist no wbc and 1 rbc in urine still some bacteria. On antibiotic had 2 more urinalysis and prostate exam all normal. Cystoscopy and cytology normal.
I had a dilation due to stricture. More flow came out, however this was two months ago and I still split stream when standing. I do not do it when sitting and never did it prior to dilation. Went to urologist two days ago prostate ok, bladder tested to see if it fully empties it does. Urinalysis perfect. Drank a little more water that day.
Split stream only occurs when standing and is greatly improved. When urination is not as powerful it occurs. Sometimes meatus (where stricture was) is a little sensitive for a few moments after urination.
I also noticed more sediment (clear particles in urine after urination) since UTII. Always had some occassionally but now seems more. Why? Could it be cancerous or dangerous? Is it just food or is bladder more sensitive since UTI. WOuldn't last urinalysis have shown some (when i went I saw a few in toilet after giving sample)? Most likely occurs when not much water or in morning or when after not urinating for a few hours.
Could it be a kidney or ureter problem? No pain and blood work good too.
Also could split stream caused by way I am built w/o stricture or still be healing from dilation albeit slowly. I feel fine but this concerns me and am afraid of cancer or ureter or kidney problem.