Well shit. That's your problem right there. No PCT is a dumb fucking thing to do my friend. Let me guess, you also didn't use any arimidex or other anti-estrgoen? FYI, as far as testosterone is concerned short temper, mental issues, and depression is due to fluctuation in estrogen levels not the androgen itself. These manifest at all points along your cycle but most noticeable in post cycle time for many people because now your test production is gone.
I don't post much in these forums but this is an easy eaaaasy fix to your problem, or at least much of it if not all of it.
Regarding hGH, if time and money aren't an issue and you have already decided to try it then I'm not going to try to talk you down. You're 30, and an adult. I will say however, two things. 1) if you are looking for rapid gains in bodyweight don't use GH by itself without androgens. If you are fine with slow gains, sort of like an enhanced natural trainee then you could swing that. 2) if you are looking for good results in mesomorphic type way (meaning strength, muscle, etc), then whoever posted 5 iu 3x a week is about twice as low as it needs to be...meaning your usage will skyrocket 10 iu x3-4 days a week....IF you use the IM and IV injection multiple times a day method. If you use the traditional sub q daily route it is gonna be waaaay more and waaay more expensive, like 50+ius a week.
If, on the other hand, you are looking for a bit of fat loss, feeling of well being, and increased resilience against injury and tendon issues, then something along the lines of 3iu a day (like baseball pitcher Roger Clemens) is in line with your goals. but you likely will not notice any strength boosts or notable muscle gains...like I mentioned "natural training plus".