Ah vent away Bec, vent away, let it all out, it's the best thing to do.
People always want to give their two cents on everything. From your family on your personal life to co-workers on your work projects.
If it isn't the songs to play on your wedding it is the food, if it isn't the food, it's the drinks, if it isn't the drinks it is the colors, if not that, then the theme, if not the theme, then the location, if not the location then the date, and on and on and on and on.
After that they'll try and ask why you painted your sitting room walls one color instead of another and when you have kids they will want to back seat drive your parenting route.
It's part of life, and a wedding is great training

, listen to their suggestions and if they are not in line with what you had in mind or unpractical just let them know you appreciate their input but things will be done your way. End.
Everybody and their grandma uses Cannon D, my grandma used it and my mom used it and so did everybody else I know apart from a handful that used the "here comes the bride" cliche march. Nothing wrong with it, but you are going for unique, so off with Cannon D! (A beautiful piece nonetheless, but the poor thing is getting dragged up every single aisle nowadays

)
Hang in there and come and vent here any time

even silly problems can amount to a lot if you don't get them out of your chest and let them pile up, better out than in.