For anyone who may be questioning, Zinnia Jones has an excellent post discussing eight signs of (indirect) gender dysphoria. It's well worth your time. If you're familiar with the basic notion of dysphoria and just want the symptoms, feel free to jump down to where those start.
Another bit about me: I've always suffered from severe clinical depression. I had a really shitty childhood, so I always just assumed that was the cause of it. When I approached my psychiatrist to ask for a letter for HRT, I only then noticed I'd never brought up trans things with him before. Because in my mind, I've never associated my depression with my gender nor my dysphoria. Just didn't seem relevant before. However, when I mentioned this to my wife, she immediately leapt to thinking they were connected. She's convinced that after transition is well underway I'll no longer need antidepressants.
Every one of ZJ's symptoms describes my childhood perfectly, including (post-childhood) the last one. As soon as I started HRT I started feeling happier, more normal, and just plain better. Even just a couple weeks in, I felt better than I have since... puberty? since forever? Whatevs. Point is things are so much better now. If you are questioning, please, do yourself a favor and look into HRT.