I was playing in my peins when im about to cum i hold it with high pressure to not wet my cloth so i got a hard pain on my testicles what i have todo?

Can not stop...: Ejaculating semen at reaching orgasm is impossible sine it is physiologically un-inhibitory. Manually compressing urethra at such moment so to prevent shooting semen is against the natural flow of ejaculation naturally resulting in variable back-up pressure about urethral compression which is related with personal semen volume and urethral distensibility. So, watch, wait, & see; don't do it again.