What are the causes of blood in urine and semen after getting the first dose of the COVID vaccine?

Hello doctor,

The day after my first COVID vaccine a year ago, I had a cramp-like pain in my scrotum. I had blood in my urine that day and the next day in my semen. So I went to the doctor, and he did a urine test and said there were little traces of blood, but since my pain was not severe then, he said it was probably nothing serious and might be a reaction from the vaccine. The doctor checked my kidneys with an ultrasound, but everything seemed fine. Then, three weeks ago, I had nitrite in my urine. So I took the tablet Cotrim-Forte-Ratiopharm 800 mg/160 mg, two pills per day for five days. The pain went almost entirely away after this treatment, but now, a few weeks later, it started again. Sometimes after ejaculating, the trouble worsens for a few days and usually starts with bladder and urethra pain after urinating. So should my prostate be checked?