Here are all the answers of your questions with proper guidline, make sure follow these:
When to Start PCT:
Start 2 weeks after your last Test-E injection.
PCT Protocol (4 weeks):
Clomid:
Weeks 1-2: 50 mg twice a day (100 mg total)
Weeks 3-4: 50 mg once a day
Nolvadex:
Weeks 1-2: 40 mg per day
Weeks 3-4: 20 mg per day
HCG (optional but recommended):
500 IU every other day for 10 days, starting right after your last Test-E injection.
Next Cycle:
Start your next cycle after at least 7 weeks off (equal to your time on cycle), but confirm your testosterone levels are normal first.