I am a 17 year old male who has noticed that I have had weaker erections lately. It basically happened all of a sudden, before I would masturbate with hard and strong erections but now they are weak and flabby. I'm very worried that something is wrong with me. I had a blood test like a month before I started noticing the erection problems and the results turned out to be fine except for some Iron and Vitamin D deficiency which I was prescribed pills for, maybe that could be the problem? It started happening around the same time as I took the pills but maybe it was just a coincidence. I would really appreciate any help because I am really worried, I am not sexually active and I only noticed it when I masturbate, Thanks!