Talk to Urologist on Timing

Hi, I'm single 27.

I don't know if this is a problem but as I've heard some rumors and I can relate to just one thing and that is "erectile timing". I mean. Everything else is okay, lifestyle is good, exercise is good, no cigarette, no nothing except I eat junk food a lot.

Please suggest me if I'm sick or something because of erectile dysfunction to only 80% hardness and timing is just 3 minutes.