So i am having a pain only when ejaculating -it is only during this. there is no consistent pain or during peeing either. it is the lower left side almost next to the penis but not in the scrotum. this is recent, last few days. never had anything bef?

This symptom might be caused by inflammation or infection internally, e.g. seminal vesiculitis, prostatitis, or posterior urethritis. If your semen is abnormally colored (yellow, brownish) that could go along with such a problem. STIs might cause such symptoms, but that's unlikely without painful urination and/or discharge from the penis. See a doctor soon, ideally a urologist. Good luck.

You might have prostatic congestion or inflammation. If it persists pl see a Urologist.