Exogenous test or any derivative of test shuts down natural testosterone production. Come off TC or TE can result in feeling like death warmed over. Switch to TP or TA for two weeks and stop. Better yet run short esters and taper down. When you're 'clean' your HTPA will resume. I just came off at 58 years old and despite having crashed my cholesterol, hence retarding my natty T production, I had another quick recovery.
Or just take Clo, No, HCG, even though taking drugs to come off drugs never computed in my mind and only prolonged the inevitable: 3-4 lethargic days either way.