Teen low testosterone or stress?

For a month and a bit more or so now, I feel as if my erections have been diminishing in strength. I don't get as many strong spontaneous erections and my morning wood is considerably weaker than say 3 months ago. I feel tired a lot and find it hard to stay awake, and my erections are not that strong. My diet is quite poor I'm only 17, I've been researching a lot and I'm scared that I have Low Testosterone. I'm so young, I should be at a sexual peak, not a decline. But my erections were not always weak, they used to be extremely rock hard, but that seemed to have disappeared. I am stressed, I sleep at 12-1 and wake up at 6:30 in the morning. any ideas? I had routine blood work not too long ago and I was fine (probably didnt include hormones though) I also donated blood 2 months prior. I'm getting disorganized and losing track of things. I considered having depression too. B


I don't want to have TRT replacement therapy, I just want to lead a normal life.
Help would be really be appreciated. I'm falling into a slump here.