HGH - Finding the Right Dose

I’m a 20 year old guy with a brain tumor, so my body can’t naturally produce testosterone or HGH. Therefore, I’ve been supplementing with testosterone and HGH injections for years now, but now that my growth plates are closed, I’m trying to find the correct adult dose for my body specifically. Right now, I take 50 mg of depo testosterone subq weekly and 0.5 mg of genotropin daily. However, although my energy is much higher than when I’m not supplementing and I don’t feel the extreme fatigue I felt, I still wake up tired and have to use caffeine (a piece of Neuro gum) before work or the gym. My most recent lab test showed an IGF 1 of 189 with a Z score of -0.7, along with a high total testosterone level of 1111 H, which are normal levels, so I’m still confused why I feel so tired. Is this just the normal reality that I’m gonna have to deal with? Even though my levels are “normal”, should I ask my endocrinologist if I can try increasing my dose?