I'm into my 3rd week of SD @ 20mg/ED and Test E @ 500mg/wk (and will end my Test with an Epi) and I feel great, only noticeable side effect is heart rate and BP, but it's not extreme. I'm running 4 Liv52 pills a day, and 8 CEL Cycle Assist Caps a day, along with a scoop of AI Cycle Support Powder in each protein shake. A lot of people report feeling like crap while on SD, but not me, and I'm guessing it's the supple amount of support supps I have. Take that for what it's worth.
For PCT, I'm planning to continue use of Liv52, CEL PCT Assist, Anabolic Xtreme Advanced PCT (both those PCT assists have different ingredients), DAA, Nolva and Clomid. I'm using a lot more supps than most people use, because I'm going a more advanced cycle, but these are things you might want to take into consideration.
To keep your gains, you have to get that natural test kicked back into production ASAP and level quick!