These are disease state levels and not even 90 year old men have levels this low, if these levels are do to testicular failure or pituitary failure, TRT is needed. Be careful most endo’s are clueless and dosing decisions need to account for pre-TRT SHBG and estrogen values.
If estrogen is in the mid-high normal ranges while testosterone is low, more frequent dosing will be needed. You should start out TRT on 60mg twice weekly unless estrogen is high, then you may need more frequent dosing using 27-29 gauge insulin syringes. You should inject in the shoulders and quads because larger needles will cause muscle tissue damages over the decades.
These low levels are most definitely the cause of stress which happens when operating on less than optimal hormone levels. If your doctor offers you 200mg every two weeks, run don’t walk away from this doctor because he doesn’t specialize in this area of medicine, there are no doctors in sick care that specialize in this area of medicine.
I have never seen such high normal SHBG levels in the company of such low testosterone levels. I’m surprised you can even walk let alone finish grad school.