Will Botox Help with my Uneven Smile? (photo)

Finally I'm fixing my teeth with invisalign and will hopefully get teeth whitening at the end of the process so I can have a great smile!! The only problem is this gummy smile! I also feel like my smile is a little crooked.I've read that people use botox to fix this problem.Can this really help with my smile?I live in long island and I can't seem to find any plastic surgeon or cosmetic dentist that does this. But I found some places in NYC. Am I better off going to a plastic surgeon?Thank You!