has anythe be used pre-seed?

Mamatoruben • 💙💗💛💚
I had a miscarriage in February 2016
And a chemical in July 2016
Been trying for 5 months since chemical and no luck what so ever. I'm very healthy being 20 years old.
Has anyone used pre-seed? And been successful... how many months did it take you to get your BFP whilst using it? 
Also do you use it every time you have sex that month?