Prone masturbation problems

Hi, I did 10 years prone masturbation. And about 1 year I stopped this habit. After 3-4 months I began doing normal method. But I have erectile dysfunction yet. I had 10-15 days nofap periods and now I am in 70th days and dont feel any improvement. I can erection in my bed when I am lying, but when I am standing, I lose my erection quickly and cant get hard while standing anymore, but in lying or sitting positions my erections are not bad. What must I do? It does me depression.