So my hair is maybe 2 inches past my shoulders but it is thick. I love wearing my hair down but curled with a curling iron. However, I will be sweating in august with it being so hot and having a big dress on..so i would be afraid to have my hair down and be even more hot and then my style would be ruined. But when I have my hair up i feel like my face looks fat. I'm about a size 12 and my dress is strapless, sweatheart neckline and ballroom skirt. What do you suggest?