My girl time is predicted on my wedding day

I apologize in advance for graphics but is anyone ever had this? So I made sure I picked a date that was not near my period. I had a funky period last month that was very long and now my cycle is in tune with it. So in September, when I plan on getting married, it's predicted that I will have it hopefully ending by that day but just in Case. Any advice on how to make it come earlier? I just don't want to be miserable at my wedding. My fiance already knows about this dilemma. he just said what can you do? The other rest of our lives for "romantic nights". So he's not upset fortunately. But I'm nervous about a white dress, cramps, hormones and being irritable. Eeeekkkk