Your mom probably - and I am just guessing here - wants to be a guest at your wedding, and you probably want to enjoy your friends and family that traveled from near and far to see you. So just letting go of the worries of getting things done and trust that a professional has "your back" - so to speak.
Some brides say that they'll trust a girlfriend to handle the planning on her wedding day - but one thing to consider is that your girlfriend may have never planned a wedding in her life. She also wants to have fun at your wedding... and she doesn't know your vendors - so in theory this is a great idea, but it may not work out how you'd planned.
Maybe giving up some responsibility on your wedding weekend to the professionals that you trust will allow you to fully enjoy your wedding! It's not an expensive idea, it's priceless - it's a day in your life that only happens once, you want it to be perfect, trust the professionals that specialize in perfect.
** All photographs Photography by Rebecca