I am wondering about some shapewear to wear under my wedding gown. It is an A-line strapless gown that has the corset tie thing in the back. It fits well except right through my hips, the tie gapes a little. I know I can have it let out a bit but was hoping to avoid that. I have been looking online forever for shapewear. I need something that will tighten up my tummy and hiney. My biggest concern is how I am going to use the restroom all night as I was blessed with a small bladder! Any advice?