How can I overcome porn and masturbation addiction at 16?

A "non-reactive" result indicates that the test did not detect HIV antibodies or antigens in your blood at the time of testing. And you have consistently received non-reactive results over a span of a few months. However, for definitive advice regarding testing intervals and your specific situation, it's essential to consult a professional who specializes in sexual health or infectious disease

At your age, it's normal to feel curious about masturbation. Masturbation is safe and healthy. It won't harm your circumcision recovery. Just make sure your hands are clean to prevent infection. 

Realize that being sexually aroused is natural, however, overdoing may deplete your strength and hinder you from gaining muscle. Get a new hobby that will keep your mind off this practice. You can also try exercising to help develop your body and eat foods that will boost your energy. In case this becomes difficult for you, talk to an older person that you trust or a counselor who can support and guide you through it. 

You took the Levonorgestrel tablet (ifree 72) after having sex without protection. This medication is designed to prevent pregnancy within a certain time frame. It is understandable if you are anxious, but there is no need for another pill; wait until your next period starts. If it is delayed or you have any unusual symptoms, you should take a pregnancy test. 

It's important to understand that sexual needs are a natural part of being human, not something abnormal. It's okay to feel bothered or depressed about them. Medications like hormone suppressors are risky and can cause serious side effects. Instead, I recommend speaking with a counselor or therapist who can help you explore and manage these feelings in a healthy, positive way, rather than suppressing them.

Bleeding after masturbation can indeed be a letdown, but usually, it's a result of minor causes such as irritation or friction. It's a good thing that you are not feeling any pain right now. The skin could be thin or dryness may be the reason for such incidents. Keep the area clean and do not aggravate it any further. Should the bleeding get any worse, or if it turns into discomfort, consult a healthcare professional for an accurate examination. They should give you tips on how to maintain a proper diet and exercise program and also give you some peace of mind.