When to start trying to induce period early?

My wedding and honeymoon are coming up soon, and I’m due to be midway through my period at that point. I’ve been looking into ways to try to start my cycle early to be done with it before then, and I’ve got parsley and vitamin C. I don’t know when to actually start using them, though? I’m supposed to start my cycle exactly one week from today - should I start trying now, or should I wait a few days? Thanks in advance!