Making dresses is hard!

Ok, so making dresses and making quilts are nothing alike. I think I am pretty good at making quilts, so I decided to make myself a dress before a wedding I am going to in August. Well, this dress is giving me fits. I don't fit into one size on the pattern, so I have to fake it to get the size right. And even then it doesn't fit in random places (the inside of my shoulder, my theighs, etc.) and I don't really know how to fix it. Grr, it is so frustrating! The pattern claims it is easy but I just don't know what I am doing wrong. I wish the pattern wouldn't assume I already know what I am doing but explain everything in great detail. If I didn't have my mother-in-law's help I wouldn't have even made it this far. Anyway, hopefully I will finish it before the wedding I am going to or else I am just going to have to wear an old boring dress that I have had for a long time. Wish me luck! I will put a picture up once I get it figured out (with more help most likely...).