20 Years old Soft Erections, No morning wood, low libido

So I am 20 years old and I have been having some issues the last year or so. I have had a girlfriend of a year and our sex life just isn't up to par. For about two and a half years I have smoked weed pretty constantly. Pretty much daily. I never wake up with morning wood anymore, I stray away from sex a lot to preserve my ego, and it's alot harder to get hard and when I do it's not full on like it should be. My sex life with my girlfriend is very up and down. Sometimes it will be good and I will have no anxiety or stress and I will be pretty hard (still not like it used to be) and things will be going good. Then others I will completely have erectile dysfunction and then it's downhill from there with anxiety and stress. I know alot is mental with me, however I know alot isn't either. I am constantly tired, I have had stomach issues, and all this came up the same time I had these issues. I got my t levels tested about a year ago but I don't remember what they were. My urologist said my free testosterone was a little low but nothing insanely bad. I don't know what to do. I had a doc tell me I had low cortisol and I have been taking supplements for that that have improved my overall being a little bit and given me more energy, but it doesn't seem to help me sexually. Any ideas? Don't know where to go from here, have seen two urologists. They drop my drawers and feel me up and tell me I'm okay and that's it. Even if I take cialis or something it's not hard like it used to be. Could this be the weed? I have taken a couple of 1 month breaks and have given it up because I didn't see much improvement ( a little though). Where do I go from here? I know alot is mental but I just feel like there's no way all of it is.