Thanks for posting your query.
It is not always necessary always for you to ejaculate only after masturbation
There could be insemination even on its own without self stimulation.
If it is not a pus discharge and if you do not have symptoms like fever
or burning or increased frequency while urination you need not worry.
I suggest you to start your sexual life post marriage.
Hope I have answered your query.
Wishing you good health.