If 50mg of testogel one sachet a day got me from 21.3nmol/L to 29.5nmol which shot and dosage would keep me at 29.5?

29.5nmolL being equal to 850 ng/dl, sorry to bump this but I need a legitimate reason for my doctor to prescribe shots so I need info on crashing and HTPA supression which after 4 months as to be happening by now.
Thanks.