I cant feel my , i need serious answers please? i will give 10 points!!?

Im 16 and a male. I masturbated nearly every day since I was 13, always had great s. I dont have any mental problems but I do have autism. Im not taking any medication. I know that Im doing it right because it feels really satisfying, and I dont want it to stop. And I could before. When it gets to the point where I cant hold it in anymore and I *** it feels good (afterwards... relaxation wise) but theres no with it (as if I didnt even ***). I just and thats it. I know this is usually the opposite of what most people experience. This has been going on for about a year and is causing me a lot of distress. I have very low testosterone so maybe thats it? I don't even enjoy masturbating anymore; the only reason I do it now is to get rid of my hornyness. Why is this happening? Im too embarred to ask my mom/doctor. Please help me