I'm getting married in 33 days and I'm still uneasy about how the petticoat and bra make me feel. I have a beautiful Oleg Cassini ballgown and my dress fits perfect but the longline bra and petticoat sit on my ribcage and it's extremely uncomfortable. Ive got th right sizes but I'm wondering if I'm wearing it in the wrong order. Should the petticoat which sits right below my breastbone go over or under the longline bra? Do I have to wear the long line bra? I bought I bc it's what David's Bridal gave me when I tried on dresses. Is it possible to just wear a regular strapless with the petticoat? I never wear stuff this thigh fitting and even though I can breathe, I'm worried I'm gonna be miserable by the end of the evening.