Empty your bladder before hand. Then you'll know.
...or taste it.![]()
And if you can cam it... notice that it comes from within the vagina and not from the urethra. The so-called G-spot is on the vaginal wall and presumably becomes engorged when stimulated. The ejaculation occurs because of intense muscle spasms in the vaginal walls... especially the kegal muscles...
You use the kegals to cut off urine flow, so it is unlikely that you are peeing during an actual orgasm....