Thanks for your query.Based on the facts that you have posted it appears that you are getting frequent urination
this is due to congestion of the urethra
that happens naturally during erection and ejaculation due to increase blood flow to the urethra and corpora cavernosa.There is nothing to worry about.
As regards your doubt about increase space between two testicles it is your anxiety
and mind that it never happens. Dr.Patil