I really doubt any Primary Care Practitioner would prescribe Post cycle meds, If you want to go that route you would have to see an endocrinologist and they may try some HCG or possibly clomid depending on their own experiences, but of course they are gonna tell you to never touch them (aas) again, and once you tell them that you have taken anabolics its going in your chart and may pose some future insurance issues. I would be more likely to get the post cycle stuff from the internet, and monitor the labs myself to see how well it works. It can take awhile to recover from deca.
And if your Dr prescribed 400mg test cyp a week, then I need his phone number! That is a whopping dose, your serum test levels will be over 1000 without a doubt.