day 13 in my sexual drive/libido is OC

Bro this is 13 days in with Nofap. bro i feel the difference when i am lifting and working out, and normally, when i workout, i feel pain, and dont wanna finish my workout, but now i can push through it. i fear of relapsing all the way to day one, because these urges are coming like hell. My testosterone is really high for my age(I turn 15 in may 11) and so is my libido/sexual energy. Porn is now trying to overtake my mind, but know if i cum, i will regret it. i have been fighting this for 4 years now and i want to stop. the girls are now coming, and thats taking a toll on me. Please help me get 30 days in. help me through this journey, cuz i dont wanna cum, unless its on a girl.