hi this is for shorys.
how old are you? i had a similar problem when i went through puberty, again like you i always had biggish balls and it turns out most of the males in my family have this too.
when i hit puberty i noticed that my balls were growing bigger at first i didnt bother but they started to get really big and there was some pain. i was too embarassed to talk to my parents about it but i went to my doctor anyway.
after an examination and some questions the doctor couldnt find an abnormal reason for my testicles ot get so large. my testicles were a lot larger than normal and the fluids in the scrotum was more abundant. the pain i felt was just the skin tightening but i was tod not to worry as it should stretch to accomodate any further growth. but i was told to make another appointment if the pain got worse.
i now realise that big balls run in my family, mine are a little larger than any of my imediate family, each one is about the size of a tennis ball. but apart from a little discomfort now and again i am fine, i do find that the amount of semen produced when i ejaculate is a lot but i sont mind it.