Bleeding everytime I internally masturbate

Hi, so I masturbate alot. However, I rarely masturbate by using toys inside of me. The main reason being, anytime I try to use a toy or masturbate internally at all, I start bleeding. I doubt it's my hymen because the amount of blood. I could be doing it to rough, but even when I do it gently there ends up being blood. I'm really scared that something could be wrong with me. Anyone got any idea why this could be happening?