What Causes Erectile Dysfunction Along With Premature Ejaculation?

Have a problem with sex life. Seems when I don t get sex enough I get extremely hard and ejaculate within 1 minute but recently me and my girlfriend have increased our sex life and she did things for me the last 3 or 4 days and when we tried to have actual sex I couldn t keep it hard enough to have sex I am 33 and tired of premature ejaculation and not getting it up when I need it