HELP !?

Keyairrah • 1 little angel , TTC our rainbow baby !
My S/O & I are TTC but I'm worried that I have no chances ! My boyfriend smokes (not cigarettes) & I'm afraid that will lower my chances in becoming pregnant . He claims he's done with smoking but I'm not so sure about that . Being that my S/O smokes will that lower my chances ? 
Feedback please 😔