As of recent my left testicle seems to have shrunk?

I just turned 15 and my left testicle is not majorly but a good amount smaller than the right and i’ve thought that it could’ve shrunk because it’s a little red, although it’s been the faintest of red but mainly brown for around 2 years. I wouldn’t have noticed it but I feel a bit of pain, not much at all just here and there. Ive checked for lumps and there is nothing. I also know that when I was a baby i had a hernia, would this have any affect on me? it was obviously fixed, but could it like come back or something? Im also worried that I could have testicular terosion is there any way I could check? Finally i was also wondering if this is just like a puberty thing and not much to worry about is it just pain that you get when they’re growing? Just worried for my health any responses would be appreciated.

sometimes one testicle can be normally smaller than the other it is best to have a proper examination by a doctor given ur have medical history it could be nothing to worry about