Hello, umm I have a small bubble feeling on my lower right abdomen when I breath deeply and also a heavy feeling, and I think in my right testicle I have found a lump on my epididymis , it is not on the testicle so I know it's not TC. What is it and should I be worried ?

That's just all too uncertain, sorry. One guess for the bubble/heavy feeling would be hernia.
As for the lump, are you sure it's something new, and not just general lumpiness of the epididymis? You need an exam in person.