Talk to Urologist on Positional Erectile Dysfunction

Asaalam alikum wa rehmatullah. Dear doctors I'm 18 years old. Mein ne pichle 1 se daid saal mein excessive masturbation ki.. Like about 2 to the times a day. Now I'm facing weakness in erections. 1 saal pehle tak mujhay morning erection tight aati thi. But ab kaafi weak ho gai ha. Right now meri condition ye ha ke morning erection tou kaafi weak ha but mein jab routine mein chahon tou erection aa tou jati ha magar aik issue ke saath. Jab mein betha hota hoon ya khara hota hun uss waqt erection ki strength achi ho jati ha. Lekin jab mein leit jata hoon apni back pr uss waqt erection aik dum weak ho jati ha aur maintain krne mein bhi masla aata ye ((venous leak)) ha?. Kya mujhay penis mein koi physical issue aa gaya ha???. Plz guide me in detail..

Jazakallah