It is body dependent, but 4 months is not going to break the bank...
Get on clomid, 4 to 6 weeks.
Transisiton from Clomid to a natural SERM if you are worried still after the Clomid use, use Rebirth by BLR
Take an AI, like aromasin or Letrone while on PCT.
You "should" be fine when all said and done.