When I do not go to urinate for a long time, it hurts very much. Something like prostatitis, but it is not. I think it is bladder symptoms, like spasmed.
What possible help you can offer ?

maybe its a sign that you just need to urinate. but i gather this is odd to you (never happened before)

go visit your doctor. dont diagnose yourself

Go the doctor. Now.

Urinary tract. go see a doctor. Urinating rids your body of toxins…if they back up you could lose a kidney.