I wear really big t-shirts because I am a really large woman. I like them long so that they cover the belly and butt. I can wear a 2X for the breast and upper tummy but then it fits snugly in the lower tummy and butt area so then I wear a 3X. How can I make a 2X bigger in the lower tummy/butt area? I have never reconstructed anything so explain things like I am a child.