Not a fan of 5-deca-zol. There's better stuff out there for the $. Since you already started tho - I always go with nolva (40/30/20/10), clomid (150/100/50/25), and testosterone recover stack. Pretty much universally applicable and I rather be over prepared than under.
PCT=post cycle therapy. If you take an anabolic, prohormone (PH) or designer steroid (DS) your body shuts down its Hypothalamic-pituitary-testicular-axis (HPTA). In other words, your body's natural test production. PCT reboots your system and prevents side effects from low test / high estrogen.