Erection dysfunction is cured with medicines

Hi. I began to nofap for ED. But I dont know my problem is PIED or venous leak. I visited doctor, but he said that it is 99% psychological problem and not need doppler for venous leak. Please give some advices to me :/ This is my story:

First, sorry for my English, if I explain someting with wrong words. I began Fap from 13 years ago and did prone masturbation everytime, 1-5 times during a day. Last a year I began normal fap and forgot prone masturbation. Now I see that my libido is very low, I cant get erection while standing and also I lose my erection very fast during changing my position or during changing video period in porn websites and etc. Also I dont have morning wood.

In one day I visited to girl for sex with money and I didn't get any erection with her. Another day I got Sildenafil and visited to other girl again and at this time again I cant get erection also. She began oral sex, then I could erection, but when she stopped, I lost my erection again. At same night at home I began doing masturbation with dreaming. In fact I love a girl who she works with me in holding and I began to dream her and I felt medicine effect and got very hard erection and I could maintain it in standing position during 5-10 minutes. It was very cool. Also I tried Tadalafil 10 mg in another day. And this medicine also effected very well to me and in same day I went to girl for sex with money. And this time girl was beautiful, but she made many limits to me and I didnt like her character and I got only 60-70% erection only.

At normally, I can only get erection when I am in lying. Today I noticed that in work when I see my lovely girl, I can feel my erection under my trousers in standing position (But I cant feel this situation and can't get erection to another girls). Also I think my body adapted prone masturbation and my penis need to rub for erection and for this reason I can erection under trousers. I cant it when I naked.

I am 20th day in nofap now. During this 20 days I could get morning erections 4-5 times (but erections are not fully hard, 60-80%) and I got 2 wet dreams. And during these 2 days I get 100% hard erection in morning, it is strange. Maybe I have venous leak? And after 90 days can I make a sex with medicine? Or I must wait cure without medicine?