See here >>
http://www.elitefitness.com/forum/anabolic-steroids/little-help-please-my-brethren-935623-2.html
Like we suggested in there, Bro, go get your bloodwork done first, then do some more research and learn more about what about all these steroids (which are almost ALL hormones) do to your body when you flood your system with it and how to minimize those effects. Following BOTH your bloodwork and some more research, post back here a bit more informed and show the results of your bloodwork and then we can talk. Not trying to be a dick here, but, honestly, you really shouldn't even be THINKING of running steroids.
Then also research some more around training routines ... after you know what steroids do, you'll need to know how your body works when it comes to training. Once you understand training better, look at how you need to feed your mucsles when trianing. Once ALL that is sorted, you'll be able to consider going on cycles and you'll have a MUCH better idea of what to expect and by when. People's bodies react differently. You say you are on 400mg Test Cyp/week ... for how long is your cycle laid out? Are you running any on-cycle support? Do you have a PCT laid out for after your cycle is done? Do you know what cycle lengths are and how they get calculated? Do you know about steroid half-lives? Do you know the ACTUAL importance of PCT? You need to know ALL THIS SHIT before you even CONSIDER going on steroids.
Like I said, Bro, not trying to be a dick, honestly, but you have some ways to go still.