Shock loss: I have done FUE hair transplant 35 days ago.

I do not know if my hair has fallen due to shock loss because the hair is short. I have learned that in order to prevent shick loss, a person must use Propecia or Rogine a long time before the HT. My question is that I am 35 days past FUE and have not used either of the medications ,if I start using them for a long term, will it help to prevent shock loss? Do you think that It will be effective for my situation or it is better to not use them.